(a) Interpretation: If the statement “A proton and an electron have the same mass but opposite charges” is true or false should be identified. Concept Introduction: A proton has positive charge and an electron has negative charge. Proton contributes in the mass of an atom, but an electron does not.

Question

MISSED THIS? Read Section 19.9 (Pages 878-881); Watch IWE 19.10 Consider the following reaction: CH3OH(g) CO(g) + 2H2(g) (Note that AG,CH3OH(g) = -162.3 kJ/mol and AG,co(g)=-137.2 kJ/mol.) Part A Calculate AG for this reaction at 25 °C under the following conditions: PCH₂OH Pco PH2 0.815 atm = 0.140 atm 0.170 atm Express your answer in kilojoules to three significant figures. Ο ΑΣΦ AG = -150 Submit Previous Answers Request Answer □? kJ × Incorrect; Try Again; 2 attempts remaining Calculate the free energy change under nonstandard conditions (AGrxn) by using the following relationship: AGrxn = AGrxn + RTInQ, AGxn+RTInQ, where AGxn is the standard free energy change, R is the ideal gas constant, T is the temperature in kelvins, a is the reaction quotient. Provide Feedback Next >

Answer 1

Question

Chapter 2, Problem 14P

Interpretation Introduction

(a)

Interpretation:

If the statement “A proton and an electron have the same mass but opposite charges” is true or false should be identified.

Concept Introduction:

A proton has positive charge and an electron has negative charge. Proton contributes in the mass of an atom, but an electron does not.

Interpretation Introduction

(b)

Interpretation:

If the statement “the mass of an electron is considerably smaller than that of a neutron” is true or false should be identified.

Concept Introduction:

Mass of neutron is slightly greater than the mass of proton which is much higher than the mass of an electron.

Interpretation Introduction

(c)

Interpretation:

If the statement “an atomic mass unit (amu) is a unit of mass” is true or false should be identified.

Concept Introduction:

Atomic mass unit is used to measure the mass of an atom.

Interpretation Introduction

(d)

Interpretation:

If the statement “One amu is equal to 1 gram” is true or false should be identified.

Concept Introduction:

Mass of an atom is very small therefore it is measured in atomic mass unit (amu).

Interpretation Introduction

(e)

Interpretation:

If the statement “the protons and neutrons of an atom are found in the nucleus” is true or false should be identified.

Concept Introduction:

In an atom protons and neutrons are found in the nucleus.

Interpretation Introduction

(f)

Interpretation:

If the statement “the electrons of an atom are found in the space surrounding the nucleus” is true or false should be identified.

Concept Introduction:

Electrons revolve around the nucleus.

Interpretation Introduction

(g)

Interpretation:

If the given statement “all atoms of the same element have the same number of protons is true or false should be identified.

Concept Introduction:

The numbers of protons in all atoms of the same element are same.

Interpretation Introduction

(h)

Interpretation:

If the statement “all the atoms of the same element have the same number of electrons” is true or false should be identified.

Concept Introduction:

The numbers of electrons in atoms of same element are same.

Interpretation Introduction

(i)

Interpretation:

If the statement “electrons and protons repel each other” is true or false should be identified.

Concept Introduction:

Electrons are negatively charged particles while protons are positively charged.

Interpretation Introduction

(j)

Interpretation:

If the statement “the size of an atom is approximately the size of its nucleus” is true or false should be identified.

Concept Introduction:

Nucleus is present at the center of an atom consisting of neutrons and protons.

(k)

Interpretation Introduction

Interpretation:

If the statement “the mass number of an atom is the sum of the numbers of protons and neutrons in the nucleus of that atom” is true or false should be identified.

Concept Introduction:

Mass number of an atom is defined as the sum of the number of protons and neutrons present in its nucleus.

Interpretation Introduction

(l)

Interpretation:

If the statement “for most atoms, their mass number is the same as their atomic number” is true or false should be identified.

Concept Introduction:

The mass number (A) of an atom is the sum of the numbers of protons and neutrons present in the nucleus of that atom.

The atomic number (Z) of an element is the number of protons present in its nucleus.

Interpretation Introduction

(m)

Interpretation:

If the statement “the three isotopes of hydrogen (hydrogen-1, hydrogen-2 and hydrogen-3) differ only in the number of neutrons in the nucleus” is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different numbers of neutrons are called isotopes.

Interpretation Introduction

(n)

Interpretation:

If the statement“Hydrogen-1 has one neutron in its nucleus, hydrogen-2 has two neutrons in its nucleus and hydrogen-3 has three neutrons” is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different number of neutrons are called isotopes.

Interpretation Introduction

(o)

Interpretation:

If the statement“All isotopes of an element have the same number of electrons”. Is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different number of neutrons are called isotopes.

Interpretation Introduction

(p)

Interpretation:

If the statement “most elements found on Earth are mixtures of isotopes” is true or false should be identified.

Concept Introduction:

Most elements found on Earth are mixtures of isotopes, in a constant ratio.

Interpretation Introduction

(q)

Interpretation:

If the statement “the atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth” is true or false should be identified.

Concept Introduction:

The atomic weight of an element given in the Periodic Table is the weighted average of the masses (in amu) of its isotopes found on Earth.

Interpretation Introduction

(r)

Interpretation:

If the statement “the atomic weights of most elements are whole numbers” is true or false should be identified.

Concept Introduction:

The atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth.

Interpretation Introduction

(s)

Interpretation:

If the statement “most of the mass of an atom is found in its nucleus” is true or false should be identified.

Concept Introduction:

Mass of an atom is the sum of mass of protons and neutrons present in its nucleus.

Interpretation Introduction

(t)

Interpretation:

If the statement “the density of a nucleus is its mass number expressed in grams” is true or false should be identified.

Concept Introduction:

Density is defined as mass per unit volume.

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MISSED THIS? Read Section 19.9 (Pages 878-881); Watch IWE 19.10 Consider the following reaction: CH3OH(g) CO(g) + 2H2(g) (Note that AG,CH3OH(g) = -162.3 kJ/mol and AG,co(g)=-137.2 kJ/mol.) Part A Calculate AG for this reaction at 25 °C under the following conditions: PCH₂OH Pco PH2 0.815 atm = 0.140 atm 0.170 atm Express your answer in kilojoules to three significant figures. Ο ΑΣΦ AG = -150 Submit Previous Answers Request Answer □? kJ × Incorrect; Try Again; 2 attempts remaining Calculate the free energy change under nonstandard conditions (AGrxn) by using the following relationship: AGrxn = AGrxn + RTInQ, AGxn+RTInQ, where AGxn is the standard free energy change, R is the ideal gas constant, T is the temperature in kelvins, a is the reaction quotient. Provide Feedback Next >

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Answer 2

Question

Chapter 2, Problem 14P

Interpretation Introduction

(a)

Interpretation:

If the statement “A proton and an electron have the same mass but opposite charges” is true or false should be identified.

Concept Introduction:

A proton has positive charge and an electron has negative charge. Proton contributes in the mass of an atom, but an electron does not.

Interpretation Introduction

(b)

Interpretation:

If the statement “the mass of an electron is considerably smaller than that of a neutron” is true or false should be identified.

Concept Introduction:

Mass of neutron is slightly greater than the mass of proton which is much higher than the mass of an electron.

Interpretation Introduction

(c)

Interpretation:

If the statement “an atomic mass unit (amu) is a unit of mass” is true or false should be identified.

Concept Introduction:

Atomic mass unit is used to measure the mass of an atom.

Interpretation Introduction

(d)

Interpretation:

If the statement “One amu is equal to 1 gram” is true or false should be identified.

Concept Introduction:

Mass of an atom is very small therefore it is measured in atomic mass unit (amu).

Interpretation Introduction

(e)

Interpretation:

If the statement “the protons and neutrons of an atom are found in the nucleus” is true or false should be identified.

Concept Introduction:

In an atom protons and neutrons are found in the nucleus.

Interpretation Introduction

(f)

Interpretation:

If the statement “the electrons of an atom are found in the space surrounding the nucleus” is true or false should be identified.

Concept Introduction:

Electrons revolve around the nucleus.

Interpretation Introduction

(g)

Interpretation:

If the given statement “all atoms of the same element have the same number of protons is true or false should be identified.

Concept Introduction:

The numbers of protons in all atoms of the same element are same.

Interpretation Introduction

(h)

Interpretation:

If the statement “all the atoms of the same element have the same number of electrons” is true or false should be identified.

Concept Introduction:

The numbers of electrons in atoms of same element are same.

Interpretation Introduction

(i)

Interpretation:

If the statement “electrons and protons repel each other” is true or false should be identified.

Concept Introduction:

Electrons are negatively charged particles while protons are positively charged.

Interpretation Introduction

(j)

Interpretation:

If the statement “the size of an atom is approximately the size of its nucleus” is true or false should be identified.

Concept Introduction:

Nucleus is present at the center of an atom consisting of neutrons and protons.

(k)

Interpretation Introduction

Interpretation:

If the statement “the mass number of an atom is the sum of the numbers of protons and neutrons in the nucleus of that atom” is true or false should be identified.

Concept Introduction:

Mass number of an atom is defined as the sum of the number of protons and neutrons present in its nucleus.

Interpretation Introduction

(l)

Interpretation:

If the statement “for most atoms, their mass number is the same as their atomic number” is true or false should be identified.

Concept Introduction:

The mass number (A) of an atom is the sum of the numbers of protons and neutrons present in the nucleus of that atom.

The atomic number (Z) of an element is the number of protons present in its nucleus.

Interpretation Introduction

(m)

Interpretation:

If the statement “the three isotopes of hydrogen (hydrogen-1, hydrogen-2 and hydrogen-3) differ only in the number of neutrons in the nucleus” is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different numbers of neutrons are called isotopes.

Interpretation Introduction

(n)

Interpretation:

If the statement“Hydrogen-1 has one neutron in its nucleus, hydrogen-2 has two neutrons in its nucleus and hydrogen-3 has three neutrons” is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different number of neutrons are called isotopes.

Interpretation Introduction

(o)

Interpretation:

If the statement“All isotopes of an element have the same number of electrons”. Is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different number of neutrons are called isotopes.

Interpretation Introduction

(p)

Interpretation:

If the statement “most elements found on Earth are mixtures of isotopes” is true or false should be identified.

Concept Introduction:

Most elements found on Earth are mixtures of isotopes, in a constant ratio.

Interpretation Introduction

(q)

Interpretation:

If the statement “the atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth” is true or false should be identified.

Concept Introduction:

The atomic weight of an element given in the Periodic Table is the weighted average of the masses (in amu) of its isotopes found on Earth.

Interpretation Introduction

(r)

Interpretation:

If the statement “the atomic weights of most elements are whole numbers” is true or false should be identified.

Concept Introduction:

The atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth.

Interpretation Introduction

(s)

Interpretation:

If the statement “most of the mass of an atom is found in its nucleus” is true or false should be identified.

Concept Introduction:

Mass of an atom is the sum of mass of protons and neutrons present in its nucleus.

Interpretation Introduction

(t)

Interpretation:

If the statement “the density of a nucleus is its mass number expressed in grams” is true or false should be identified.

Concept Introduction:

Density is defined as mass per unit volume.

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Answer 3

Question

Chapter 2, Problem 14P

Interpretation Introduction

(a)

Interpretation:

If the statement “A proton and an electron have the same mass but opposite charges” is true or false should be identified.

Concept Introduction:

A proton has positive charge and an electron has negative charge. Proton contributes in the mass of an atom, but an electron does not.

Interpretation Introduction

(b)

Interpretation:

If the statement “the mass of an electron is considerably smaller than that of a neutron” is true or false should be identified.

Concept Introduction:

Mass of neutron is slightly greater than the mass of proton which is much higher than the mass of an electron.

Interpretation Introduction

(c)

Interpretation:

If the statement “an atomic mass unit (amu) is a unit of mass” is true or false should be identified.

Concept Introduction:

Atomic mass unit is used to measure the mass of an atom.

Interpretation Introduction

(d)

Interpretation:

If the statement “One amu is equal to 1 gram” is true or false should be identified.

Concept Introduction:

Mass of an atom is very small therefore it is measured in atomic mass unit (amu).

Interpretation Introduction

(e)

Interpretation:

If the statement “the protons and neutrons of an atom are found in the nucleus” is true or false should be identified.

Concept Introduction:

In an atom protons and neutrons are found in the nucleus.

Interpretation Introduction

(f)

Interpretation:

If the statement “the electrons of an atom are found in the space surrounding the nucleus” is true or false should be identified.

Concept Introduction:

Electrons revolve around the nucleus.

Interpretation Introduction

(g)

Interpretation:

If the given statement “all atoms of the same element have the same number of protons is true or false should be identified.

Concept Introduction:

The numbers of protons in all atoms of the same element are same.

Interpretation Introduction

(h)

Interpretation:

If the statement “all the atoms of the same element have the same number of electrons” is true or false should be identified.

Concept Introduction:

The numbers of electrons in atoms of same element are same.

Interpretation Introduction

(i)

Interpretation:

If the statement “electrons and protons repel each other” is true or false should be identified.

Concept Introduction:

Electrons are negatively charged particles while protons are positively charged.

Interpretation Introduction

(j)

Interpretation:

If the statement “the size of an atom is approximately the size of its nucleus” is true or false should be identified.

Concept Introduction:

Nucleus is present at the center of an atom consisting of neutrons and protons.

(k)

Interpretation Introduction

Interpretation:

If the statement “the mass number of an atom is the sum of the numbers of protons and neutrons in the nucleus of that atom” is true or false should be identified.

Concept Introduction:

Mass number of an atom is defined as the sum of the number of protons and neutrons present in its nucleus.

Interpretation Introduction

(l)

Interpretation:

If the statement “for most atoms, their mass number is the same as their atomic number” is true or false should be identified.

Concept Introduction:

The mass number (A) of an atom is the sum of the numbers of protons and neutrons present in the nucleus of that atom.

The atomic number (Z) of an element is the number of protons present in its nucleus.

Interpretation Introduction

(m)

Interpretation:

If the statement “the three isotopes of hydrogen (hydrogen-1, hydrogen-2 and hydrogen-3) differ only in the number of neutrons in the nucleus” is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different numbers of neutrons are called isotopes.

Interpretation Introduction

(n)

Interpretation:

If the statement“Hydrogen-1 has one neutron in its nucleus, hydrogen-2 has two neutrons in its nucleus and hydrogen-3 has three neutrons” is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different number of neutrons are called isotopes.

Interpretation Introduction

(o)

Interpretation:

If the statement“All isotopes of an element have the same number of electrons”. Is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different number of neutrons are called isotopes.

Interpretation Introduction

(p)

Interpretation:

If the statement “most elements found on Earth are mixtures of isotopes” is true or false should be identified.

Concept Introduction:

Most elements found on Earth are mixtures of isotopes, in a constant ratio.

Interpretation Introduction

(q)

Interpretation:

If the statement “the atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth” is true or false should be identified.

Concept Introduction:

The atomic weight of an element given in the Periodic Table is the weighted average of the masses (in amu) of its isotopes found on Earth.

Interpretation Introduction

(r)

Interpretation:

If the statement “the atomic weights of most elements are whole numbers” is true or false should be identified.

Concept Introduction:

The atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth.

Interpretation Introduction

(s)

Interpretation:

If the statement “most of the mass of an atom is found in its nucleus” is true or false should be identified.

Concept Introduction:

Mass of an atom is the sum of mass of protons and neutrons present in its nucleus.

Interpretation Introduction

(t)

Interpretation:

If the statement “the density of a nucleus is its mass number expressed in grams” is true or false should be identified.

Concept Introduction:

Density is defined as mass per unit volume.

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Answer 4

Question

Chapter 2, Problem 14P

Interpretation Introduction

(a)

Interpretation:

If the statement “A proton and an electron have the same mass but opposite charges” is true or false should be identified.

Concept Introduction:

A proton has positive charge and an electron has negative charge. Proton contributes in the mass of an atom, but an electron does not.

Interpretation Introduction

(b)

Interpretation:

If the statement “the mass of an electron is considerably smaller than that of a neutron” is true or false should be identified.

Concept Introduction:

Mass of neutron is slightly greater than the mass of proton which is much higher than the mass of an electron.

Interpretation Introduction

(c)

Interpretation:

If the statement “an atomic mass unit (amu) is a unit of mass” is true or false should be identified.

Concept Introduction:

Atomic mass unit is used to measure the mass of an atom.

Interpretation Introduction

(d)

Interpretation:

If the statement “One amu is equal to 1 gram” is true or false should be identified.

Concept Introduction:

Mass of an atom is very small therefore it is measured in atomic mass unit (amu).

Interpretation Introduction

(e)

Interpretation:

If the statement “the protons and neutrons of an atom are found in the nucleus” is true or false should be identified.

Concept Introduction:

In an atom protons and neutrons are found in the nucleus.

Interpretation Introduction

(f)

Interpretation:

If the statement “the electrons of an atom are found in the space surrounding the nucleus” is true or false should be identified.

Concept Introduction:

Electrons revolve around the nucleus.

Interpretation Introduction

(g)

Interpretation:

If the given statement “all atoms of the same element have the same number of protons is true or false should be identified.

Concept Introduction:

The numbers of protons in all atoms of the same element are same.

Interpretation Introduction

(h)

Interpretation:

If the statement “all the atoms of the same element have the same number of electrons” is true or false should be identified.

Concept Introduction:

The numbers of electrons in atoms of same element are same.

Interpretation Introduction

(i)

Interpretation:

If the statement “electrons and protons repel each other” is true or false should be identified.

Concept Introduction:

Electrons are negatively charged particles while protons are positively charged.

Interpretation Introduction

(j)

Interpretation:

If the statement “the size of an atom is approximately the size of its nucleus” is true or false should be identified.

Concept Introduction:

Nucleus is present at the center of an atom consisting of neutrons and protons.

(k)

Interpretation Introduction

Interpretation:

If the statement “the mass number of an atom is the sum of the numbers of protons and neutrons in the nucleus of that atom” is true or false should be identified.

Concept Introduction:

Mass number of an atom is defined as the sum of the number of protons and neutrons present in its nucleus.

Interpretation Introduction

(l)

Interpretation:

If the statement “for most atoms, their mass number is the same as their atomic number” is true or false should be identified.

Concept Introduction:

The mass number (A) of an atom is the sum of the numbers of protons and neutrons present in the nucleus of that atom.

The atomic number (Z) of an element is the number of protons present in its nucleus.

Interpretation Introduction

(m)

Interpretation:

If the statement “the three isotopes of hydrogen (hydrogen-1, hydrogen-2 and hydrogen-3) differ only in the number of neutrons in the nucleus” is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different numbers of neutrons are called isotopes.

Interpretation Introduction

(n)

Interpretation:

If the statement“Hydrogen-1 has one neutron in its nucleus, hydrogen-2 has two neutrons in its nucleus and hydrogen-3 has three neutrons” is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different number of neutrons are called isotopes.

Interpretation Introduction

(o)

Interpretation:

If the statement“All isotopes of an element have the same number of electrons”. Is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different number of neutrons are called isotopes.

Interpretation Introduction

(p)

Interpretation:

If the statement “most elements found on Earth are mixtures of isotopes” is true or false should be identified.

Concept Introduction:

Most elements found on Earth are mixtures of isotopes, in a constant ratio.

Interpretation Introduction

(q)

Interpretation:

If the statement “the atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth” is true or false should be identified.

Concept Introduction:

The atomic weight of an element given in the Periodic Table is the weighted average of the masses (in amu) of its isotopes found on Earth.

Interpretation Introduction

(r)

Interpretation:

If the statement “the atomic weights of most elements are whole numbers” is true or false should be identified.

Concept Introduction:

The atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth.

Interpretation Introduction

(s)

Interpretation:

If the statement “most of the mass of an atom is found in its nucleus” is true or false should be identified.

Concept Introduction:

Mass of an atom is the sum of mass of protons and neutrons present in its nucleus.

Interpretation Introduction

(t)

Interpretation:

If the statement “the density of a nucleus is its mass number expressed in grams” is true or false should be identified.

Concept Introduction:

Density is defined as mass per unit volume.

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Answer 5

Chapter 2, Problem 14P

Interpretation Introduction

(a)

Interpretation:

If the statement “A proton and an electron have the same mass but opposite charges” is true or false should be identified.

Concept Introduction:

A proton has positive charge and an electron has negative charge. Proton contributes in the mass of an atom, but an electron does not.

Interpretation Introduction

(b)

Interpretation:

If the statement “the mass of an electron is considerably smaller than that of a neutron” is true or false should be identified.

Concept Introduction:

Mass of neutron is slightly greater than the mass of proton which is much higher than the mass of an electron.

Interpretation Introduction

(c)

Interpretation:

If the statement “an atomic mass unit (amu) is a unit of mass” is true or false should be identified.

Concept Introduction:

Atomic mass unit is used to measure the mass of an atom.

Interpretation Introduction

(d)

Interpretation:

If the statement “One amu is equal to 1 gram” is true or false should be identified.

Concept Introduction:

Mass of an atom is very small therefore it is measured in atomic mass unit (amu).

Interpretation Introduction

(e)

Interpretation:

If the statement “the protons and neutrons of an atom are found in the nucleus” is true or false should be identified.

Concept Introduction:

In an atom protons and neutrons are found in the nucleus.

Interpretation Introduction

(f)

Interpretation:

If the statement “the electrons of an atom are found in the space surrounding the nucleus” is true or false should be identified.

Concept Introduction:

Electrons revolve around the nucleus.

Interpretation Introduction

(g)

Interpretation:

If the given statement “all atoms of the same element have the same number of protons is true or false should be identified.

Concept Introduction:

The numbers of protons in all atoms of the same element are same.

Interpretation Introduction

(h)

Interpretation:

If the statement “all the atoms of the same element have the same number of electrons” is true or false should be identified.

Concept Introduction:

The numbers of electrons in atoms of same element are same.

Interpretation Introduction

(i)

Interpretation:

If the statement “electrons and protons repel each other” is true or false should be identified.

Concept Introduction:

Electrons are negatively charged particles while protons are positively charged.

Interpretation Introduction

(j)

Interpretation:

If the statement “the size of an atom is approximately the size of its nucleus” is true or false should be identified.

Concept Introduction:

Nucleus is present at the center of an atom consisting of neutrons and protons.

(k)

Interpretation Introduction

Interpretation:

If the statement “the mass number of an atom is the sum of the numbers of protons and neutrons in the nucleus of that atom” is true or false should be identified.

Concept Introduction:

Mass number of an atom is defined as the sum of the number of protons and neutrons present in its nucleus.

Interpretation Introduction

(l)

Interpretation:

If the statement “for most atoms, their mass number is the same as their atomic number” is true or false should be identified.

Concept Introduction:

The mass number (A) of an atom is the sum of the numbers of protons and neutrons present in the nucleus of that atom.

The atomic number (Z) of an element is the number of protons present in its nucleus.

Interpretation Introduction

(m)

Interpretation:

If the statement “the three isotopes of hydrogen (hydrogen-1, hydrogen-2 and hydrogen-3) differ only in the number of neutrons in the nucleus” is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different numbers of neutrons are called isotopes.

Interpretation Introduction

(n)

Interpretation:

If the statement“Hydrogen-1 has one neutron in its nucleus, hydrogen-2 has two neutrons in its nucleus and hydrogen-3 has three neutrons” is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different number of neutrons are called isotopes.

Interpretation Introduction

(o)

Interpretation:

If the statement“All isotopes of an element have the same number of electrons”. Is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different number of neutrons are called isotopes.

Interpretation Introduction

(p)

Interpretation:

If the statement “most elements found on Earth are mixtures of isotopes” is true or false should be identified.

Concept Introduction:

Most elements found on Earth are mixtures of isotopes, in a constant ratio.

Interpretation Introduction

(q)

Interpretation:

If the statement “the atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth” is true or false should be identified.

Concept Introduction:

The atomic weight of an element given in the Periodic Table is the weighted average of the masses (in amu) of its isotopes found on Earth.

Interpretation Introduction

(r)

Interpretation:

If the statement “the atomic weights of most elements are whole numbers” is true or false should be identified.

Concept Introduction:

The atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth.

Interpretation Introduction

(s)

Interpretation:

If the statement “most of the mass of an atom is found in its nucleus” is true or false should be identified.

Concept Introduction:

Mass of an atom is the sum of mass of protons and neutrons present in its nucleus.

Interpretation Introduction

(t)

Interpretation:

If the statement “the density of a nucleus is its mass number expressed in grams” is true or false should be identified.

Concept Introduction:

Density is defined as mass per unit volume.

Answer 6

Chapter 2, Problem 14P

Interpretation Introduction

(a)

Interpretation:

If the statement “A proton and an electron have the same mass but opposite charges” is true or false should be identified.

Concept Introduction:

A proton has positive charge and an electron has negative charge. Proton contributes in the mass of an atom, but an electron does not.

Answer 7

Chapter 2, Problem 14P

Interpretation Introduction

(a)

Interpretation:

If the statement “A proton and an electron have the same mass but opposite charges” is true or false should be identified.

Concept Introduction:

A proton has positive charge and an electron has negative charge. Proton contributes in the mass of an atom, but an electron does not.

Answer 8

Interpretation Introduction

(b)

Interpretation:

If the statement “the mass of an electron is considerably smaller than that of a neutron” is true or false should be identified.

Concept Introduction:

Mass of neutron is slightly greater than the mass of proton which is much higher than the mass of an electron.

Answer 9

Interpretation Introduction

(b)

Interpretation:

If the statement “the mass of an electron is considerably smaller than that of a neutron” is true or false should be identified.

Concept Introduction:

Mass of neutron is slightly greater than the mass of proton which is much higher than the mass of an electron.

Answer 10

Interpretation Introduction

(c)

Interpretation:

If the statement “an atomic mass unit (amu) is a unit of mass” is true or false should be identified.

Concept Introduction:

Atomic mass unit is used to measure the mass of an atom.

Answer 11

Interpretation Introduction

(c)

Interpretation:

If the statement “an atomic mass unit (amu) is a unit of mass” is true or false should be identified.

Concept Introduction:

Atomic mass unit is used to measure the mass of an atom.

Answer 12

Interpretation Introduction

(d)

Interpretation:

If the statement “One amu is equal to 1 gram” is true or false should be identified.

Concept Introduction:

Mass of an atom is very small therefore it is measured in atomic mass unit (amu).

Answer 13

Interpretation Introduction

(d)

Interpretation:

If the statement “One amu is equal to 1 gram” is true or false should be identified.

Concept Introduction:

Mass of an atom is very small therefore it is measured in atomic mass unit (amu).

Answer 14

Interpretation Introduction

(e)

Interpretation:

If the statement “the protons and neutrons of an atom are found in the nucleus” is true or false should be identified.

Concept Introduction:

In an atom protons and neutrons are found in the nucleus.

Answer 15

Interpretation Introduction

(e)

Interpretation:

If the statement “the protons and neutrons of an atom are found in the nucleus” is true or false should be identified.

Concept Introduction:

In an atom protons and neutrons are found in the nucleus.

Answer 16

Interpretation Introduction

(f)

Interpretation:

If the statement “the electrons of an atom are found in the space surrounding the nucleus” is true or false should be identified.

Concept Introduction:

Electrons revolve around the nucleus.

Answer 17

Interpretation Introduction

(f)

Interpretation:

If the statement “the electrons of an atom are found in the space surrounding the nucleus” is true or false should be identified.

Concept Introduction:

Electrons revolve around the nucleus.

Answer 18

Interpretation Introduction

(g)

Interpretation:

If the given statement “all atoms of the same element have the same number of protons is true or false should be identified.

Concept Introduction:

The numbers of protons in all atoms of the same element are same.

Answer 19

Interpretation Introduction

(g)

Interpretation:

If the given statement “all atoms of the same element have the same number of protons is true or false should be identified.

Concept Introduction:

The numbers of protons in all atoms of the same element are same.

Answer 20

Interpretation Introduction

(h)

Interpretation:

If the statement “all the atoms of the same element have the same number of electrons” is true or false should be identified.

Concept Introduction:

The numbers of electrons in atoms of same element are same.

Answer 21

Interpretation Introduction

(h)

Interpretation:

If the statement “all the atoms of the same element have the same number of electrons” is true or false should be identified.

Concept Introduction:

The numbers of electrons in atoms of same element are same.

Answer 22

Interpretation Introduction

(i)

Interpretation:

If the statement “electrons and protons repel each other” is true or false should be identified.

Concept Introduction:

Electrons are negatively charged particles while protons are positively charged.

Answer 23

Interpretation Introduction

(i)

Interpretation:

If the statement “electrons and protons repel each other” is true or false should be identified.

Concept Introduction:

Electrons are negatively charged particles while protons are positively charged.

Answer 24

Interpretation Introduction

(j)

Interpretation:

If the statement “the size of an atom is approximately the size of its nucleus” is true or false should be identified.

Concept Introduction:

Nucleus is present at the center of an atom consisting of neutrons and protons.

Answer 25

Interpretation Introduction

(j)

Interpretation:

If the statement “the size of an atom is approximately the size of its nucleus” is true or false should be identified.

Concept Introduction:

Nucleus is present at the center of an atom consisting of neutrons and protons.

Answer 26

(k)

Interpretation Introduction

Interpretation:

If the statement “the mass number of an atom is the sum of the numbers of protons and neutrons in the nucleus of that atom” is true or false should be identified.

Concept Introduction:

Mass number of an atom is defined as the sum of the number of protons and neutrons present in its nucleus.

Answer 27

(k)

Interpretation Introduction

Interpretation:

If the statement “the mass number of an atom is the sum of the numbers of protons and neutrons in the nucleus of that atom” is true or false should be identified.

Concept Introduction:

Mass number of an atom is defined as the sum of the number of protons and neutrons present in its nucleus.

Answer 28

Interpretation Introduction

(l)

Interpretation:

If the statement “for most atoms, their mass number is the same as their atomic number” is true or false should be identified.

Concept Introduction:

The mass number (A) of an atom is the sum of the numbers of protons and neutrons present in the nucleus of that atom.

The atomic number (Z) of an element is the number of protons present in its nucleus.

Answer 29

Interpretation Introduction

(l)

Interpretation:

If the statement “for most atoms, their mass number is the same as their atomic number” is true or false should be identified.

Concept Introduction:

The mass number (A) of an atom is the sum of the numbers of protons and neutrons present in the nucleus of that atom.

The atomic number (Z) of an element is the number of protons present in its nucleus.

Answer 30

Interpretation Introduction

(m)

Interpretation:

If the statement “the three isotopes of hydrogen (hydrogen-1, hydrogen-2 and hydrogen-3) differ only in the number of neutrons in the nucleus” is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different numbers of neutrons are called isotopes.

Answer 31

Interpretation Introduction

(m)

Interpretation:

If the statement “the three isotopes of hydrogen (hydrogen-1, hydrogen-2 and hydrogen-3) differ only in the number of neutrons in the nucleus” is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different numbers of neutrons are called isotopes.

Answer 32

Interpretation Introduction

(n)

Interpretation:

If the statement“Hydrogen-1 has one neutron in its nucleus, hydrogen-2 has two neutrons in its nucleus and hydrogen-3 has three neutrons” is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different number of neutrons are called isotopes.

Answer 33

Interpretation Introduction

(n)

Interpretation:

If the statement“Hydrogen-1 has one neutron in its nucleus, hydrogen-2 has two neutrons in its nucleus and hydrogen-3 has three neutrons” is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different number of neutrons are called isotopes.

Answer 34

Interpretation Introduction

(o)

Interpretation:

If the statement“All isotopes of an element have the same number of electrons”. Is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different number of neutrons are called isotopes.

Answer 35

Interpretation Introduction

(o)

Interpretation:

If the statement“All isotopes of an element have the same number of electrons”. Is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different number of neutrons are called isotopes.

Answer 36

Interpretation Introduction

(p)

Interpretation:

If the statement “most elements found on Earth are mixtures of isotopes” is true or false should be identified.

Concept Introduction:

Most elements found on Earth are mixtures of isotopes, in a constant ratio.

Answer 37

Interpretation Introduction

(p)

Interpretation:

If the statement “most elements found on Earth are mixtures of isotopes” is true or false should be identified.

Concept Introduction:

Most elements found on Earth are mixtures of isotopes, in a constant ratio.

Answer 38

Interpretation Introduction

(q)

Interpretation:

If the statement “the atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth” is true or false should be identified.

Concept Introduction:

The atomic weight of an element given in the Periodic Table is the weighted average of the masses (in amu) of its isotopes found on Earth.

Answer 39

Interpretation Introduction

(q)

Interpretation:

If the statement “the atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth” is true or false should be identified.

Concept Introduction:

The atomic weight of an element given in the Periodic Table is the weighted average of the masses (in amu) of its isotopes found on Earth.

Answer 40

Interpretation Introduction

(r)

Interpretation:

If the statement “the atomic weights of most elements are whole numbers” is true or false should be identified.

Concept Introduction:

The atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth.

Answer 41

Interpretation Introduction

(r)

Interpretation:

If the statement “the atomic weights of most elements are whole numbers” is true or false should be identified.

Concept Introduction:

The atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth.

Answer 42

Interpretation Introduction

(s)

Interpretation:

If the statement “most of the mass of an atom is found in its nucleus” is true or false should be identified.

Concept Introduction:

Mass of an atom is the sum of mass of protons and neutrons present in its nucleus.

Answer 43

Interpretation Introduction

(s)

Interpretation:

If the statement “most of the mass of an atom is found in its nucleus” is true or false should be identified.

Concept Introduction:

Mass of an atom is the sum of mass of protons and neutrons present in its nucleus.

Answer 44

Interpretation Introduction

(t)

Interpretation:

If the statement “the density of a nucleus is its mass number expressed in grams” is true or false should be identified.

Concept Introduction:

Density is defined as mass per unit volume.

Answer 45

Interpretation Introduction

(t)

Interpretation:

If the statement “the density of a nucleus is its mass number expressed in grams” is true or false should be identified.

Concept Introduction:

Density is defined as mass per unit volume.

Answer 46

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Answer 47

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Answer 61

Ch. 2.2 - Problem 2-1 Write the formulas of compounds in...Ch. 2.4 - Problem 2-2 What is the mass number of an atom...Ch. 2.4 - Problem 2-3 Name the elements given in Problem...Ch. 2.4 - Problem 2-4 (a) What are the atomic numbers of...Ch. 2.4 - Prob. 2.5QC Ch. 2.4 - Problem 2-6 The atomic weight of lithium is 6.941...Ch. 2.6 - Problem 2-7 Write the Lewis dot structure for the...Ch. 2 - Prob. 1P Ch. 2 - 9 Answer true or false. (a) Matter is divided into...Ch. 2 - Prob. 3P

Concept explainers

(b)

Interpretation:

If the statement “the mass of an electron is considerably smaller than that of a neutron” is true or false should be identified.

Concept Introduction:

Mass of neutron is slightly greater than the mass of proton which is much higher than the mass of an electron.

(c)

Interpretation:

If the statement “an atomic mass unit (amu) is a unit of mass” is true or false should be identified.

Concept Introduction:

Atomic mass unit is used to measure the mass of an atom.

(d)

Interpretation:

If the statement “One amu is equal to 1 gram” is true or false should be identified.

Concept Introduction:

Mass of an atom is very small therefore it is measured in atomic mass unit (amu).

(e)

Interpretation:

If the statement “the protons and neutrons of an atom are found in the nucleus” is true or false should be identified.

Concept Introduction:

In an atom protons and neutrons are found in the nucleus.

(f)

Interpretation:

If the statement “the electrons of an atom are found in the space surrounding the nucleus” is true or false should be identified.

Concept Introduction:

Electrons revolve around the nucleus.

(g)

Interpretation:

If the given statement “all atoms of the same element have the same number of protons is true or false should be identified.

Concept Introduction:

The numbers of protons in all atoms of the same element are same.

(h)

Interpretation:

If the statement “all the atoms of the same element have the same number of electrons” is true or false should be identified.

Concept Introduction:

The numbers of electrons in atoms of same element are same.

(i)

Interpretation:

If the statement “electrons and protons repel each other” is true or false should be identified.

Concept Introduction:

Electrons are negatively charged particles while protons are positively charged.

(j)

Interpretation:

If the statement “the size of an atom is approximately the size of its nucleus” is true or false should be identified.

Concept Introduction:

Nucleus is present at the center of an atom consisting of neutrons and protons.

(o)

Interpretation:

If the statement“All isotopes of an element have the same number of electrons”. Is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different number of neutrons are called isotopes.

(p)

Interpretation:

If the statement “most elements found on Earth are mixtures of isotopes” is true or false should be identified.

Concept Introduction:

Most elements found on Earth are mixtures of isotopes, in a constant ratio.

(r)

Interpretation:

If the statement “the atomic weights of most elements are whole numbers” is true or false should be identified.

Concept Introduction:

The atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth.

(s)

Interpretation:

If the statement “most of the mass of an atom is found in its nucleus” is true or false should be identified.

Concept Introduction:

Mass of an atom is the sum of mass of protons and neutrons present in its nucleus.

(t)

Interpretation:

If the statement “the density of a nucleus is its mass number expressed in grams” is true or false should be identified.

Concept Introduction:

Density is defined as mass per unit volume.

Chapter 2 Solutions

Concept explainers

(b) Interpretation: If the statement “the mass of an electron is considerably smaller than that of a neutron” is true or false should be identified. Concept Introduction: Mass of neutron is slightly greater than the mass of proton which is much higher than the mass of an electron.

(c) Interpretation: If the statement “an atomic mass unit (amu) is a unit of mass” is true or false should be identified. Concept Introduction: Atomic mass unit is used to measure the mass of an atom.

(d) Interpretation: If the statement “One amu is equal to 1 gram” is true or false should be identified. Concept Introduction: Mass of an atom is very small therefore it is measured in atomic mass unit (amu).

(e) Interpretation: If the statement “the protons and neutrons of an atom are found in the nucleus” is true or false should be identified. Concept Introduction: In an atom protons and neutrons are found in the nucleus.

(f) Interpretation: If the statement “the electrons of an atom are found in the space surrounding the nucleus” is true or false should be identified. Concept Introduction: Electrons revolve around the nucleus.

(g) Interpretation: If the given statement “all atoms of the same element have the same number of protons is true or false should be identified. Concept Introduction: The numbers of protons in all atoms of the same element are same.

(h) Interpretation: If the statement “all the atoms of the same element have the same number of electrons” is true or false should be identified. Concept Introduction: The numbers of electrons in atoms of same element are same.

(i) Interpretation: If the statement “electrons and protons repel each other” is true or false should be identified. Concept Introduction: Electrons are negatively charged particles while protons are positively charged.

(j) Interpretation: If the statement “the size of an atom is approximately the size of its nucleus” is true or false should be identified. Concept Introduction: Nucleus is present at the center of an atom consisting of neutrons and protons.

(o) Interpretation: If the statement“All isotopes of an element have the same number of electrons”. Is true or false should be identified. Concept Introduction: Atoms with the same number of protons but different number of neutrons are called isotopes.

(p) Interpretation: If the statement “most elements found on Earth are mixtures of isotopes” is true or false should be identified. Concept Introduction: Most elements found on Earth are mixtures of isotopes, in a constant ratio.

(r) Interpretation: If the statement “the atomic weights of most elements are whole numbers” is true or false should be identified. Concept Introduction: The atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth.

(s) Interpretation: If the statement “most of the mass of an atom is found in its nucleus” is true or false should be identified. Concept Introduction: Mass of an atom is the sum of mass of protons and neutrons present in its nucleus.

(t) Interpretation: If the statement “the density of a nucleus is its mass number expressed in grams” is true or false should be identified. Concept Introduction: Density is defined as mass per unit volume.

Chapter 2 Solutions

(b)

Interpretation:

If the statement “the mass of an electron is considerably smaller than that of a neutron” is true or false should be identified.

Concept Introduction:

Mass of neutron is slightly greater than the mass of proton which is much higher than the mass of an electron.

(c)

Interpretation:

If the statement “an atomic mass unit (amu) is a unit of mass” is true or false should be identified.

Concept Introduction:

Atomic mass unit is used to measure the mass of an atom.

(d)

Interpretation:

If the statement “One amu is equal to 1 gram” is true or false should be identified.

Concept Introduction:

Mass of an atom is very small therefore it is measured in atomic mass unit (amu).

(e)

Interpretation:

If the statement “the protons and neutrons of an atom are found in the nucleus” is true or false should be identified.

Concept Introduction:

In an atom protons and neutrons are found in the nucleus.

(f)

Interpretation:

If the statement “the electrons of an atom are found in the space surrounding the nucleus” is true or false should be identified.

Concept Introduction:

Electrons revolve around the nucleus.

(g)

Interpretation:

If the given statement “all atoms of the same element have the same number of protons is true or false should be identified.

Concept Introduction:

The numbers of protons in all atoms of the same element are same.

(h)

Interpretation:

If the statement “all the atoms of the same element have the same number of electrons” is true or false should be identified.

Concept Introduction:

The numbers of electrons in atoms of same element are same.

(i)

Interpretation:

If the statement “electrons and protons repel each other” is true or false should be identified.

Concept Introduction:

Electrons are negatively charged particles while protons are positively charged.

(j)

Interpretation:

If the statement “the size of an atom is approximately the size of its nucleus” is true or false should be identified.

Concept Introduction:

Nucleus is present at the center of an atom consisting of neutrons and protons.

(o)

Interpretation:

If the statement“All isotopes of an element have the same number of electrons”. Is true or false should be identified.

Concept Introduction:

Atoms with the same number of protons but different number of neutrons are called isotopes.

(p)

Interpretation:

If the statement “most elements found on Earth are mixtures of isotopes” is true or false should be identified.

Concept Introduction:

Most elements found on Earth are mixtures of isotopes, in a constant ratio.

(r)

Interpretation:

If the statement “the atomic weights of most elements are whole numbers” is true or false should be identified.

Concept Introduction:

The atomic weight of an element given in the Periodic Table is the weighted average of the masses of its isotopes found on Earth.

(s)

Interpretation:

If the statement “most of the mass of an atom is found in its nucleus” is true or false should be identified.

Concept Introduction:

Mass of an atom is the sum of mass of protons and neutrons present in its nucleus.

(t)

Interpretation:

If the statement “the density of a nucleus is its mass number expressed in grams” is true or false should be identified.

Concept Introduction:

Density is defined as mass per unit volume.