General Chemistry
General Chemistry
7th Edition
ISBN: 9780073402758
Author: Chang, Raymond/ Goldsby
Publisher: McGraw-Hill College
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Chapter 2, Problem 2.56QP

(a)

Interpretation Introduction

Interpretation:

SO2 is whether molecule or compound or element have to be identified.

Concept Introduction:

Element is a free state of an atom and it is the simplest form of an atom.

Molecule is made of two or more atoms of same element or different elements.  If atoms of same element combine to form a molecule then the molecule is called homonuclear molecule.  If atoms of different element combine to form a molecule then the molecule is called heteronuclear molecule.

Compound is a stable chemical substance made of many such identical entities of heteronuclear molecules.

(a)

Expert Solution
Check Mark

Answer to Problem 2.56QP

SO2 is both a molecule and compound.

Explanation of Solution

SO2 is a heteronuclear diatomic molecule made up of Sulfur and Oxygen atoms.  Many such SO2 molecules combine and exist as compound.

(b)

Interpretation Introduction

Interpretation:

S8 is whether molecule or compound or element have to be identified.

Concept Introduction:

Element is a free state of an atom and it is the simplest form of an atom.

Molecule is made of two or more atoms of same element or different elements.  If atoms of same element combine to form a molecule then the molecule is called homonuclear molecule.  If atoms of different element combine to form a molecule then the molecule is called heteronuclear molecule.

Compound is a stable chemical substance made of many such identical entities of heteronuclear molecules.

(b)

Expert Solution
Check Mark

Answer to Problem 2.56QP

S8 is both element and a molecule.

Explanation of Solution

S8 is an homonuclear polyatomic molecule made of Sulfur atoms.  In pure elemental form Sulfur atoms exist as polyatomic molecule.

(c)

Interpretation Introduction

Interpretation:

Cs is whether molecule or compound or element have to be identified.

Concept Introduction:

Element is a free state of an atom and it is the simplest form of an atom.

Molecule is made of two or more atoms of same element or different elements.  If atoms of same element combine to form a molecule then the molecule is called homonuclear molecule.  If atoms of different element combine to form a molecule then the molecule is called heteronuclear molecule.

Compound is a stable chemical substance made of many such identical entities of heteronuclear molecules.

(c)

Expert Solution
Check Mark

Answer to Problem 2.56QP

Cs is an element.

Explanation of Solution

Cs is merely an element.  It is not a molecule or compound as in elemental form it does not combine with other Cs atoms.

(d)

Interpretation Introduction

Interpretation:

N2O5 is whether molecule or compound or element have to be identified.

Concept Introduction:

Element is a free state of an atom and it is the simplest form of an atom.

Molecule is made of two or more atoms of same element or different elements.  If atoms of same element combine to form a molecule then the molecule is called homonuclear molecule.  If atoms of different element combine to form a molecule then the molecule is called heteronuclear molecule.

Compound is a stable chemical substance made of many such identical entities of heteronuclear molecules.

(d)

Expert Solution
Check Mark

Answer to Problem 2.56QP

N2O5 is both a molecule and compound.

Explanation of Solution

N2O5 is a heteronuclear polyatomic molecule made of Nitrogen and Oxygen atoms.  Many such N2O5 molecules combine and exist as compound.

(e)

Interpretation Introduction

Interpretation:

O is whether molecule or compound or element have to be identified.

Concept Introduction:

Element is a free state of an atom and it is the simplest form of an atom.

Molecule is made of two or more atoms of same element or different elements.  If atoms of same element combine to form a molecule then the molecule is called homonuclear molecule.  If atoms of different element combine to form a molecule then the molecule is called heteronuclear molecule.

Compound is a stable chemical substance made of many such identical entities of heteronuclear molecules.

(e)

Expert Solution
Check Mark

Explanation of Solution

O is an element.

(f)

Interpretation Introduction

Interpretation:

O2 is whether molecule or compound or element have to be identified.

Concept Introduction:

Element is a free state of an atom and it is the simplest form of an atom.

Molecule is made of two or more atoms of same element or different elements.  If atoms of same element combine to form a molecule then the molecule is called homonuclear molecule.  If atoms of different element combine to form a molecule then the molecule is called heteronuclear molecule.

Compound is a stable chemical substance made of many such identical entities of heteronuclear molecules.

(f)

Expert Solution
Check Mark

Explanation of Solution

O2 is a molecule but not compound.  O2 is diatomic homonuclear molecule made of same elemental O atoms.

(g)

Interpretation Introduction

Interpretation:

O3 is whether molecule or compound or element have to be identified.

Concept Introduction:

Element is a free state of an atom and it is the simplest form of an atom.

Molecule is made of two or more atoms of same element or different elements.  If atoms of same element combine to form a molecule then the molecule is called homonuclear molecule.  If atoms of different element combine to form a molecule then the molecule is called heteronuclear molecule.

Compound is a stable chemical substance made of many such identical entities of heteronuclear molecules.

(g)

Expert Solution
Check Mark

Explanation of Solution

O3 is a molecule but not compound.  O3 is triatomic homonuclear molecule made of same O atoms.

(h)

Interpretation Introduction

Interpretation:

CH4 is whether molecule or compound or element have to be identified.

Concept Introduction:

Element is a free state of an atom and it is the simplest form of an atom.

Molecule is made of two or more atoms of same element or different elements.  If atoms of same element combine to form a molecule then the molecule is called homonuclear molecule.  If atoms of different element combine to form a molecule then the molecule is called heteronuclear molecule.

Compound is a stable chemical substance made of many such identical entities of heteronuclear molecules.

(h)

Expert Solution
Check Mark

Answer to Problem 2.56QP

CH4 is both a molecule and compound.

Explanation of Solution

CH4 is a heteronuclear polyatomic molecule made of Carbon and Hydrogen atoms.  Many such CH4 molecules combine and exist as compound.

(i)

Interpretation Introduction

Interpretation:

KBr is whether molecule or compound or element have to be identified.

Concept Introduction:

Element is a free state of an atom and it is the simplest form of an atom.

Molecule is made of two or more atoms of same element or different elements.  If atoms of same element combine to form a molecule then the molecule is called homonuclear molecule.  If atoms of different element combine to form a molecule then the molecule is called heteronuclear molecule.

Compound is a stable chemical substance made of many such identical entities of heteronuclear molecules.

(i)

Expert Solution
Check Mark

Answer to Problem 2.56QP

KBr is a compound.

Explanation of Solution

KBr is an ionic compound formed from K and Br atoms.

(j)

Interpretation Introduction

Interpretation:

S is whether molecule or compound or element have to be identified.

Concept Introduction:

Element is a free state of an atom and it is the simplest form of an atom.

Molecule is made of two or more atoms of same element or different elements.  If atoms of same element combine to form a molecule then the molecule is called homonuclear molecule.  If atoms of different element combine to form a molecule then the molecule is called heteronuclear molecule.

Compound is a stable chemical substance made of many such identical entities of heteronuclear molecules.

(j)

Expert Solution
Check Mark

Explanation of Solution

S is an element.

(k)

Interpretation Introduction

Interpretation:

P4 is whether molecule or compound or element have to be identified.

Concept Introduction:

Element is a free state of an atom and it is the simplest form of an atom.

Molecule is made of two or more atoms of same element or different elements.  If atoms of same element combine to form a molecule then the molecule is called homonuclear molecule.  If atoms of different element combine to form a molecule then the molecule is called heteronuclear molecule.

Compound is a stable chemical substance made of many such identical entities of heteronuclear molecules.

(k)

Expert Solution
Check Mark

Answer to Problem 2.56QP

P4 is both element and a molecule.

Explanation of Solution

P4 is an homonuclear polyatomic molecule made of Phosphorus atoms.  In pure elemental form Phosphorus atoms exist as polyatomic molecule.

(l)

Interpretation Introduction

Interpretation:

LiF is whether molecule or compound or element have to be identified.

Concept Introduction:

Element is a free state of an atom and it is the simplest form of an atom.

Molecule is made of two or more atoms of same element or different elements.  If atoms of same element combine to form a molecule then the molecule is called homonuclear molecule.  If atoms of different element combine to form a molecule then the molecule is called heteronuclear molecule.

Compound is a stable chemical substance made of many such identical entities of heteronuclear molecules.

(l)

Expert Solution
Check Mark

Answer to Problem 2.56QP

LiF is a compound.

Explanation of Solution

LiF is an ionic compound formed from Li and F atoms.

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Chapter 2 Solutions

General Chemistry

Ch. 2.7 - Prob. 1PECh. 2.7 - Prob. 2PECh. 2.7 - Prob. 3PECh. 2.7 - Prob. 4PECh. 2.7 - Prob. 5PECh. 2.8 - Prob. 1RCCh. 2 - Prob. 2.1QPCh. 2 - Prob. 2.2QPCh. 2 - Prob. 2.3QPCh. 2 - 2.4 Describe the contributions of these scientists...Ch. 2 - 2.5 A sample of a radioactive element is found to...Ch. 2 - 2.6 Describe the experimental basis for believing...Ch. 2 - Prob. 2.7QPCh. 2 - 2.8 Roughly speaking, the radius of an atom is...Ch. 2 - Prob. 2.9QPCh. 2 - Prob. 2.10QPCh. 2 - 2.11 What is the mass number of an iron atom that...Ch. 2 - Prob. 2.12QPCh. 2 - Prob. 2.13QPCh. 2 - Prob. 2.14QPCh. 2 - Prob. 2.15QPCh. 2 - Prob. 2.16QPCh. 2 - Prob. 2.17QPCh. 2 - Prob. 2.18QPCh. 2 - Prob. 2.19QPCh. 2 - Prob. 2.20QPCh. 2 - Prob. 2.21QPCh. 2 - Prob. 2.22QPCh. 2 - Prob. 2.23QPCh. 2 - Prob. 2.24QPCh. 2 - Prob. 2.25QPCh. 2 - Prob. 2.26QPCh. 2 - Prob. 2.27QPCh. 2 - Prob. 2.28QPCh. 2 - Prob. 2.29QPCh. 2 - Prob. 2.30QPCh. 2 - 2.31 Identify the following as elements or...Ch. 2 - Prob. 2.32QPCh. 2 - Prob. 2.33QPCh. 2 - Prob. 2.34QPCh. 2 - Prob. 2.35QPCh. 2 - Prob. 2.36QPCh. 2 - Prob. 2.37QPCh. 2 - Prob. 2.38QPCh. 2 - Prob. 2.39QPCh. 2 - Prob. 2.40QPCh. 2 - Prob. 2.41QPCh. 2 - Prob. 2.42QPCh. 2 - Prob. 2.43QPCh. 2 - Prob. 2.44QPCh. 2 - Prob. 2.45QPCh. 2 - Prob. 2.46QPCh. 2 - Prob. 2.47QPCh. 2 - Prob. 2.48QPCh. 2 - Prob. 2.49QPCh. 2 - Prob. 2.50QPCh. 2 - Prob. 2.51QPCh. 2 - Prob. 2.52QPCh. 2 - Prob. 2.53QPCh. 2 - Prob. 2.54QPCh. 2 - Prob. 2.55QPCh. 2 - Prob. 2.56QPCh. 2 - Prob. 2.57QPCh. 2 - Prob. 2.58QPCh. 2 - Prob. 2.59QPCh. 2 - Prob. 2.60QPCh. 2 - Prob. 2.62QPCh. 2 - Prob. 2.63QPCh. 2 - Prob. 2.64QPCh. 2 - Prob. 2.65QPCh. 2 - Prob. 2.66QPCh. 2 - Prob. 2.67QPCh. 2 - Prob. 2.68QPCh. 2 - Prob. 2.69QPCh. 2 - Prob. 2.70QPCh. 2 - Prob. 2.71QPCh. 2 - Prob. 2.72QPCh. 2 - Prob. 2.73QPCh. 2 - Prob. 2.74QPCh. 2 - Prob. 2.75QPCh. 2 - Prob. 2.76SPCh. 2 - Prob. 2.77SPCh. 2 - Prob. 2.78SPCh. 2 - Prob. 2.79SPCh. 2 - Prob. 2.80SPCh. 2 - Prob. 2.81SPCh. 2 - Prob. 2.82SP
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