Chapter 3, Problem 33E

(a)

Interpretation Introduction

Interpretation: The molar mass of aspirin is to be calculated.

Concept introduction: The amount corresponding to any substance or compound can be conveniently evaluated through mole concept. This theory associates the substance’s moles (amount) and its respective molar mass. Mathematically, the relationship is depicted by the formula:

  $\text{Moles}=\text{Given}\text{mass}/\text{Molar}\text{mass}$

The Avogadro’s number interconverts substance’s moles to its molecules.

(b)

Interpretation Introduction

Interpretation: The number of moles and molecules of ${\text{C}}_9{\text{H}}_8{\text{O}}_4$ in $500.0\text{mg}$ aspirin tablet is to be calculated.

Concept introduction: The amount corresponding to any substance or compound can be conveniently evaluated through mole concept. This theory associates the substance’s moles (amount) and its respective molar mass. Mathematically, the relationship is depicted by the formula:

  $\text{Moles}=\text{Given}\text{mass}/\text{Molar}\text{mass}$

The Avogadro’s number interconverts substance’s moles to its molecules.