At 1 atm and 298K, is N2 diffusion 1000x slower than the mean N2 velocity?

(a) yes because PV/nRT <1 under these conditions;

(b) yes because PV/nRT >1 under these conditions

(c) no because PV/nRT >1 under these conditions

(c) Real gasses at high density have repulsive interactions

d) no because the mean free path is about 60 nm

e) yes because the mean free path is about 60 nm