A Molecule in an Ideal Gas Has an Rms Velocity

Multiple Choice

A molecule in an ideal gas has an rms velocity 450 m/s. If the mean free path of the particle in the gas is 5.00 × 10^-8 m, then what is the average time between collisions?

A) 1.11 × 10^-10 sec
B) 1.98 × 10^-10 sec
C) 2.03 × 10^-10 sec
D) 2.56 × 10^-10 sec
E) 3.03 × 10^-10 sec