Chapter 6.8, Problem 16PE

Interpretation Introduction

Interpretation: The noble gas from which helium effuses $3.16$ times faster is to be predicted.

Concept introduction: The molar mass of other noble gas from which helium effuses $3.16$ times faster is calculated by Graham’s formula,

$M_{\text{unknown}}={\left(\frac{r_{\text{He}}}{r_{\text{unknown}}}\right)}^2{M}_{\text{He}}$

To determine: The noble gas from which helium effuses $3.16$ times faster.