Chapter 4, Problem 4.39QP

(a)

Interpretation Introduction

Interpretation:

The number of moles present in $15.0\text{ g NaCl}$ has to be calculated.

Concept Introduction:

Moles:

Mole of the compound present in the solution is calculated by molarity, concentration of the compound multiplied with litre, volume of solution.

  $\text{No}\text{. of moles (n) = }\frac{\text{mass}}{\text{Molar mass}}$

(b)

Interpretation Introduction

Interpretation:

The number of moles present in $15.0{\text{ g Na}}_{\text{2}}{\text{SO}}_{\text{4}}$ has to be calculated.

Concept Introduction:

Refer part (a)