Chapter 3, Problem 3.127P

(a)

Interpretation Introduction

Interpretation:

The molar mass and formula of citric acid is to be determined.

Concept introduction:

Molar mass is the mass of one mole of a substance in grams and it is equal to the summation of the mass of moles of each element present in the substance. The S.I unit of molar mass is $\text{g/mol}$.

(b)

Interpretation Introduction

Interpretation:

The number of moles of citric acid in $1.50\text{ qt}$ of lemon juice is to be calculated.

Concept introduction:

Density is defined as mass per unit volume. Mass and volume are physical quantities and the units of mass and volume are fundamental units. Density is the ratio of mass to the volume. The unit of volume is derived from the units of mass and volume. The SI unit of density is ${\text{kg/m}}^{\text{3}}$. The formula to calculate density is,

  $\text{Density}=\frac{\text{Mass}}{\text{Volume}}$        (2)

The formula to calculate moles of a substance is as follows:

  $\text{Moles}=\frac{\text{mass}}{\text{molar mass}}$        (3)