22 over three equals 44 over n two. I solve for n and I find six. That's exactly how I use Avogadro's Law to solve problems. 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.