A gas exerts pressure on its container because
-
some of its molecules are moving faster than others
- of the collision of the molecules with each other
- of the mass of the molecules of gas
- the molecules of a gas colide with the walls of the container
The correct answer is: A
Explanation
A gas exerts pressure on the walls of the container because the particles of gas move randomly in all directions at high speed. As a result, the particles hit each other and also hit the walls of the container with force.