The Mean Free Path for a Nitrogen Molecule in a Tank

Multiple Choice

The mean free path for a nitrogen molecule in a tank of dry nitrogen at $273 \mathrm{~K}$ is $0.15 \mu \mathrm{m}$ . If the diameter of a nitrogen molecule is $0.29 \mathrm{~nm}$ , what is the pressure in the tank?

A) $67.2 \mathrm{kPa}$
B) $211 \mathrm{kPa}$
C) $95.1 \mathrm{kPa}$
D) $48.0 \mathrm{kPa}$
E) $299 \mathrm{kPa}$