Why is the number of molecules per unit volume of a gas is fewer compared to that of a liquid or solid ?

The number of molecules per unit volume (n) of a gas is given by

Kinetic energy per unit volume of a gas is

Expansibility of a gas is much greater than that of a liquid or solid why?

Why is the compressibility of a gas higher than that of a liquid or a solid?

The pressure energy per unit volume of a liquid is

The mean free path X of molecules is given by where n is the number of molecules per unit volume and d is the diameter of the molecules.

In certain region of space there are n number of molecules per unit volume. The temperature of the gas is T. The pressure of the gas will be (k = Boltzmann's constant and R = universal gas constant)

In certain region of space there are n number of molecules per unit volume. The temperature of the gas is T. The pressure of the gas will be (k = Boltzmann's constant and R = universal gas constant)

The mean free path lambda of molecules is given by where n id the number of molecules per unit volume and d is the diameter of the molecules.