Physics

Problem

Dry air in a container has a uniform number density of

2.5\times10^{25}\,\text{m}^{-3}

. Assume the molecules have mass

4.65\times10^{-26}\,\text{kg}

and a root-mean-square speed of

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

. What is the approximate pressure of the gas? a)

3.2\times10^{4}\,\text{Pa}

1.5\times10^{5}\,\text{Pa}

9.7\times10^{4}\,\text{Pa}

2.9\times10^{5}\,\text{Pa}