Dry air in a container has a uniform number density of

PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

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}

(b)

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

(c)

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

(d)

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