Chapter 4, Problem 4.40QP

(a)

Interpretation Introduction

Interpretation:

The formula mass and molar mass of the formula unit, ${\text{S}}_{\text{8}}$ has to be calculated.

Concept Introduction:

Formula mass:

Formula mass of a compound is the sum of the atomic masses of all atoms in the compound.  It is expressed in $\text{amu}$.

Molar mass:

Molar mass is the mass (in grams) of one mole of a substance.  It is expressed in $\text{g/mol}$.

The molar mass of compound is numerically equal to the formula mass in $\text{amu}\text{.}$

(b)

Interpretation Introduction

Interpretation:

The formula mass and molar mass of the formula unit, ${{\text{(NH}}_{\text{4}}\text{)}}_{\text{2}}{\text{SO}}_{\text{4}}$ has to be calculated.

Concept Introduction:

Refer part (a)

(c)

Interpretation Introduction

Interpretation:

The formula mass and molar mass of the formula unit, ${\text{CO}}_2$ has to be calculated.

Concept Introduction:

Refer part (a).