Chemistry

Problem

An unknown monatomic noble gas has an rms speed of

237\,\text{m s}^{-1}

at 298 K. Using

R=8.314\,\text{J mol}^{-1}\text{K}^{-1}

, determine the approximate molar mass of the gas. a)

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

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

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

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