Chemistry

Problem

A sample of argon (molar mass

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

) is held at

300\,\text{K}

. What is the approximate root-mean-square speed of an argon atom in the sample? (Use

R=8.31\,\text{J\,mol}^{-1}\text{K}^{-1}

.) a)

3.5\times10^{2}\,\text{m\,s}^{-1}

6.1\times10^{2}\,\text{m\,s}^{-1}

8.6\times10^{2}\,\text{m\,s}^{-1}

4.3\times10^{2}\,\text{m\,s}^{-1}