What happens when a piston is used to decrease the volume of a contained gas? a fewer gas particles exert a force on the piston. b the piston's pressure on the gas becomes greater than the pressure exerted by the gas on the piston. c gas particles become compressed. d gas particles leak out of the container?

The volume of a gas corresponds to the space it occupies and this depends on the container in which it is contained, as large as the container is, the gas will fully occupy the volume offered to it. This is due to the fact that gases are formed by particles (atoms or molecules) that move rapidly and continuously in all directions and directions. The gas particles continue their linear motion which is only redirected when they collide with each other or with the vessel walls. Due to this continuous movement, the gas particles do not settle on the ground by gravity and consequently the volume of the gas will coincide with the volume of the container containing it.

If a piston is used to decrease the volume of a contained gas, the collision of the downwardly moving piston with the gas molecules causes the molecules to become compacted.