Essential Chemistry for IGCSE - Particles And Purification (Section 8 - No. 48)
Why does a gas exert pressure on the walls of its container?
Because the gas particles are at rest.
Because gas particles are attracted to the walls.
Because the gas particles collide with the walls.
Because the container has a force on the gas.
Explanation
The pressure of a gas is caused by the collisions of the gas particles with the walls of the container.
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