Helium has molar mass and neon has molar mass

CHEMISTRY · Multi-part · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures

Problem

Helium has molar mass

4 \text{ g mol}^{-1}

and neon has molar mass

20 \text{ g mol}^{-1}

. The helium and neon are kept in the same container. What is the ratio of: (a) the average kinetic energies of molecules

\frac{\bar{E}_{\text{He}}}{\bar{E}_{\text{Ne}}}

(b) the average rms speeds of molecules

\frac{c_{\text{He}}}{c_{\text{Ne}}}