Chapter 13, Problem 125AP

Interpretation Introduction

Interpretation:

The amount of oxygen remaining after the decomposition of the compound, and the ratio of oxygen to the initial volume of the compound are to be determined.

Concept Introduction:

${\text{H}}_2{\text{O}}_2$ undergoes decomposition by the reaction as follows:

${\text{2H}}_2{\text{O}}_2\to 2{\text{H}}_2{\text{O+O}}_2.$

According to the ideal gas equation:

$P=\frac{n\text{R}T}{V}.$

Here $P$ is the pressure, $\text{R}$ is theuniversal gas constant, $T$ is the absolute temperature, and $V$ is the volume.

Moles are calculated as follows:

$\text{Moles}=\frac{\text{Given mass}}{\text{Molar mass}}.$