Chapter 3, Problem 3.143AP

(a)

Interpretation Introduction

Interpretation: The mass of ${\text{KO}}_2$ and ${\text{Na}}_2{\text{O}}_2$ required to produce the oxygen gas enough for two hours underwater and the solid material out of it occupy more volume is to be determined.

Concept introduction: The mass of reactant required in the given reaction is calculated by multiplying its number of moles with the molar mass.

To determine: The mass of ${\text{KO}}_2$ required to produce given mass of oxygen gas.

(b)

Interpretation Introduction

To determine: If the mass of ${\text{Na}}_2{\text{O}}_2$ less or more required as compared to ${\text{KO}}_2$ to produce equal amount of ${\text{O}}_2$ as in part (a).

(c)

Interpretation Introduction

To determine: The solid material which occupy less volume out of ${\text{Na}}_2{\text{O}}_2$ and ${\text{KO}}_2$.