Chapter 6.7, Problem 12PE

Interpretation Introduction

Interpretation: The given question stated that a gas mixture called Heliox, consists $52.17\%{\text{O}}_2$ and $47.83\%\text{He}$ by mass which is used in scuba tanks for descents more than $65\text{m}$ below the surface. The mole fractions of $\text{He}$ and ${\text{O}}_2$ present in the mixture is to be calculated.

Concept introduction: The formula to calculate number of moles is,

$n=\frac{m}{M_w}$

The formula to calculate mole fraction is,

$X_{\text{x}}=\frac{n_{\text{x}}}{n_{\text{total}}}$

To determine: The mole fractions of $\text{He}$ and ${\text{O}}_2$ present in the mixture.