Chapter 10, Problem 10.47SP

Interpretation Introduction

Interpretation:

The average molecular weight of diving gaseous mixture of ${\text{O}}_{\text{2}}$ and $\text{He}$ is to be calculated.

Concept introduction:

The expression to evaluate the molecular weight of mixture is given as follows:

$\text{Molecular weight of mixture}=\left[\begin{array}{l}\left({\text{volume fraction of O}}_{\text{2}}\right)\left({\text{Molar mass of O}}_{\text{2}}\right)+\\ \left(\text{volume fraction of He}\right)\left(\text{Molar mass of He}\right)\end{array}\right]$