The average distance between collisions for atoms in a real gas is known as the mean free path (see pp. 298-9 in mckay). which of the answers below best represents the mean free path for gas molecules at stp with atomic radii on the order of 1.0 x 10-10 m? the average distance between collisions for atoms in a real gas is known as the mean free path (see pp. 298-9 in mckay). which of the answers below best represents the mean free path for gas molecules at stp with atomic radii on the order of 1.0 x 10-10 m?

a. 30 nm
b. 3000 nm
c. 300 nm
d. 3 nm