A Molecule in an Ideal Gas Has an Rms Velocity $\times$

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 $\times$ 10^-8 m,then what is the average time between collisions?

A) 1.11 $\times$ 10^-10 sec
B) 1.98 $\times$ 10^-10 sec
C) 2.03 $\times$ 10^-10 sec
D) 2.56 $\times$ 10^-10 sec
E) 3.03 $\times$ 10^-10 sec