Which of the following statements about the kinetic molecular theory are correct?

a. the average kinetic energy of the molecules is not related to the absolute temperature
b. the combined volume of all the molecules of the gas is negligible relative to the total volume in which the gas is contained
c. attractive and repulsive forces between gas molecules are negligible
d. gases consist of molecules that are in continuous, random motion

The statements (b), (c), and (d) are correct.  

Explanation:

Based on the revision of the kinetic molecular theory, let us evaluate the given statements:

(a) Is incorrect, since the average kinetic energy of the molecules is proportional to the temperature of the gas molecules.      

(b) Is true, because the gas molecules are negligible small compared to the distances between the particles, so the volume of a gas is almost empty space.      

(c) Is true, there is no force of attraction or repulsion between gas molecules or with the walls of the container.        

(d) Is true, the gases are composed of molecules that are in continuous and random motion, moving in straight lines and changing directions when they collide with the walls of the container or with other particles.  

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