Chemistry

Problem

Two monatomic ideal gases, X and Y, are each at

300\,\text{K}

. Gas X has a molar mass of

16.0\,\text{g mol}^{-1}

. The root-mean-square speed of gas Y is exactly

\frac{1}{2}

that of gas X. Determine the molar mass of gas Y in

\text{g mol}^{-1}