Chapter 3, Problem 3.20P

(a)

Interpretation Introduction

Interpretation: The moles present in $\text{85}{\text{.5 g CH}}_3{\text{CH}}_2{\text{CH}}_3$ is to be calculated.

Concept introduction: The formula to convert mass in grams to moles is as follows:

  $\text{Number of moles}=\frac{\text{Given mass}}{\text{molar mass}}$

(b)

Interpretation Introduction

Interpretation: The mass of carbon present in $\text{85}{\text{.5 g CH}}_3{\text{CH}}_2{\text{CH}}_3$ is to be calculated.

Concept introduction: The formula to convert mass in grams to moles is as follows:

  $\text{Number of moles}=\frac{\text{Given mass}}{\text{molar mass}}$