Chapter 10.3, Problem 47SSC

Interpretation Introduction

Interpretation: The determination of the molar mass of a compound needs to be determined.

Concept Introduction: The molar mass of a compound is defined as a mass of 1 mol of the compound.

Explanation of Solution

The molar mass of a compound can be calculated by taking the sum of atomic masses of all the elements present in it.

For example: ${\text{H}}_{\text{2}}\text{O}$

  $\begin{array}{l}\text{H-atomic mass=1 amu=1 g/mol}\\ \text{O-atomic mass=16 amu=16 g/mol}\end{array}$

The molar mass is calculated as follows:

  $\begin{array}{l}{\text{H}}_{\text{2}}\text{O=2}\left(\text{H}\right)\text{+1}\left(\text{O}\right)\\ {\text{M}}_{{\text{H}}_{\text{2}}\text{O}}\text{=2×1+1×16}\\ {\text{M}}_{{\text{H}}_{\text{2}}\text{O}}\text{=18 g/mol}\end{array}$