Chapter 9, Problem 15CR

Interpretation Introduction

(a)

Interpretation:

The number of moles in 2.45 g ${\text{Fe}}_{\text{2}}{\text{O}}_{\text{3}}$ should be calculated.

Concept Introduction:

The total number of protons and number of neutrons of any element is called, atomic mass of that element. It is a decimal digit for example the atomic mass of $\text{H}-\text{1 }$ is $1.008\text{a}\text{m}\text{u}$.

The molar mass of any element is the mass of $6.02\times {10}^{23}$ atoms or 1 mole of that element. The unit of molar mass is grams.

Mass of any substance can be calculated as follows:

$\text{Mass in gram = Number of moles}\times \text{Molar mass}$

Number of moles can be calculated as follows;

$\text{Number of moles}\text{=}\frac{\text{mass in g}}{\text{molar}\text{mass}}$.

Interpretation Introduction

(b)

Interpretation:

The number of moles in 2.45 g of ${\text{P}}_4(s)$ should be calculated.

Concept Introduction:

The total number of protons and number of neutrons of any element is called, atomic mass of that element. It is a decimal digit for example the atomic mass of $\text{H}-\text{1 }$ is $1.008\text{ amu}$.

The molar mass of any element is the mass of $6.02\times {10}^{23}$ atoms or 1 mole of that element. The unit of molar mass is grams.

Mass of any substance can be calculated as follows:

$\text{Mass in gram = Number of moles}\times \text{Molar mass}$

Number of moles can be calculated as follows;

$\text{Number of moles}\text{=}\frac{\text{mass in g}}{\text{molar}\text{mass}}$.

Interpretation Introduction

(c)

Interpretation:

The number of moles in 2.45 g of ${\text{Cl}}_{\text{2}}(g)$ should be calculated.

Concept Introduction:

The total number of protons and number of neutrons of any element is called, atomic mass of that element. It is a decimal digit for example the atomic mass of $\text{H}-\text{1 }$ is $1.008\text{ amu}$.

The molar mass of any element is the mass of $6.02\times {10}^{23}$ atoms or 1 mole of that element. The unit of molar mass is grams.

Mass of any substance can be calculated as follows:

$\text{Mass in gram = Number of moles}\times \text{Molar mass}$

Number of moles can be calculated as follows;

$\text{Number of moles}\text{=}\frac{\text{mass in g}}{\text{molar}\text{mass}}$.

Interpretation Introduction

(d)

Interpretation:

The number of moles in 2.45 g of ${\text{Hg}}_{\text{2}}\text{O(}\text{s})$ should be calculated.

Concept Introduction:

The total number of protons and number of neutrons of any element is called, atomic mass of that element. It is a decimal digit for example the atomic mass of $\text{H}-\text{1 }$ is $1.008\text{ amu}$.

The molar mass of any element is the mass of $6.02\times {10}^{23}$ atoms or 1 mole of that element. The unit of molar mass is grams.

Mass of any substance can be calculated as follows:

$\text{Mass in gram = Number of moles}\times \text{Molar mass}$

Number of moles can be calculated as follows;

$\text{Number of moles}\text{=}\frac{\text{mass in g}}{\text{molar}\text{mass}}$.

Interpretation Introduction

(e)

Interpretation:

The number of moles in 2.45 g of $\text{HgO}$ should be calculated.

Concept Introduction:

The total number of protons and number of neutrons of any element is called, atomic mass of that element. It is a decimal digit for example the atomic mass of $\text{H}-\text{1 }$ is $1.008\text{ amu}$.

The molar mass of any element is the mass of $6.02\times {10}^{23}$ atoms or 1 mole of that element. The unit of molar mass is grams.

Mass of any substance can be calculated as follows:

$\text{Mass in gram = Number of moles}\times \text{Molar mass}$

Number of moles can be calculated as follows;

$\text{Number of moles}\text{=}\frac{\text{mass in g}}{\text{molar}\text{mass}}$.

Interpretation Introduction

(f)

Interpretation:

The number of moles in 2.45 g of ${\text{Ca(NO}}_{\text{3}}{\text{)}}_{\text{2}}(s)$ should be calculated.

Concept Introduction:

The total number of protons and number of neutrons of any element is called, atomic mass of that element. It is a decimal digit for example the atomic mass of $\text{H}-\text{1 }$ is $1.00\text{8 amu}$.

The molar mass of any element is the mass of $6.02\times {10}^{23}$ atoms or 1 mole of that element. The unit of molar mass is grams.

Mass of any substance can be calculated as follows:

$\text{Mass in gram = Number of moles}\times \text{Molar mass}$

Number of moles can be calculated as follows;

$\text{Number of moles}\text{=}\frac{\text{mass in g}}{\text{molar}\text{mass}}$.

Interpretation Introduction

(g)

Interpretation:

The number of moles in 2.45 g of ${\text{C}}_{\text{3}}{\text{H}}_{\text{8}}(g)$ should be calculated.

Concept Introduction:

The total number of protons and number of neutrons of any element is called, atomic mass of that element. It is a decimal digit for example the atomic mass of $\text{H}-\text{1 }$ is $1.008\text{ amu}$.

The molar mass of any element is the mass of $6.02\times {10}^{23}$ atoms or 1 mole of that element. The unit of molar mass is grams.

Mass of any substance can be calculated as follows:

$\text{Mass in gram = Number of moles}\times \text{Molar mass}$

Number of moles can be calculated as follows;

$\text{Number of moles}\text{=}\frac{\text{mass in g}}{\text{molar}\text{mass}}$.

Interpretation Introduction

(h)

Interpretation:

The number of moles in 2.45 g of ${\text{Al}}_{\text{2}}{{\text{(SO}}_{\text{4}}\text{)}}_{\text{3}}(s)$ should be calculated.

Concept Introduction:

The total number of protons and number of neutrons of any element is called, atomic mass of that element. It is a decimal digit for example the atomic mass of $\text{H}-\text{1 }$ is $1.008\text{a}\text{m}\text{u}$.

The molar mass of any element is the mass of $6.02\times {10}^{23}$ atoms or 1 mole of that element. The unit of molar mass is grams.

Mass of any substance can be calculated as follows:

$\text{Mass in gram = Number of moles}\times \text{Molar mass}$

Number of moles can be calculated as follows;

$\text{Number of moles}\text{=}\frac{\text{mass in g}}{\text{molar}\text{mass}}$.