Question

why do gas exert pressure?​

Answer 1

Answer:

The pressure exerted by a gas is due to the random motion of particles in the gas. Gases have weak intermolecular forces and the particles in continuous random motion and these particles collide with the walls of the container. These collisions with the walls of the container exerts pressure on the gas.

Answer 2

Answer:

Because it has mass and matter confined in a less space which disperse and cause energy to be exerted on the walls of the container