Chapter 4, Problem 4.31QP

(a)

Interpretation Introduction

Interpretation:

The number of moles of Helium present in $2.00\text{ g He}$ 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 of Sodium present in $0.040\text{ kg Na}$ has to be calculated.

Concept Introduction:

Refer subpart (a)

(c)

Interpretation Introduction

Interpretation:

The number of moles of Chlorine present in $3.0{\text{ g Cl}}_{\text{2}}$ has to be calculated.

Concept Introduction:

Refer subpart (a)