So now let's explain Avogadro's Law, a macro scale concept using a microscale concept or the kinetic theory or the Kinetic molecular theory. Now, Kinetic theory explains of Agadro's Law in the following way. Now if temperature and pressure is to remain constant, an increase in the number of moles will increase volume. In other words, if our kinetic energy or average kinetic energy of our molecules is to remain the same, and the pressure or the force per unit area exerted by or on the walls of my container is to remain the same, that means when we increase the number of moles, we also increase the number of molecules hitting the walls. And that means the only way to keep these two guys constant is if we increase the volume. That's exactly how our kinetic theory explains Abogro's Law.