collisions are always elastic

heavier molecules transfer more momentum to the wall of the container

only a small number molecules have very high velocity

between collisions, the molecules move in straight line with constant velocity

behaves similar to an ideal gas in the limit of large molar volumes.

behaves similar to an ideal gas in the limit of large pressures.

is characterized by van der Waals coefficients that are dependent on the identity of the gas but are independent of the temperature.

has the pressure that is lower than the pressure exerted by the same gas behaving ideally.