And we saw that these laws both helped us explain exactly how gas molecules interact and function on the macroscopic level. Now we're going to look at a third law called Avocadoso's Law. And we're going to see how this law also helps us gain more intuition about the interactions of gas molecules on a macroscopic level. So let's look at the conditions under which this law holds. So this law will only work when our pressure and temperature are both held constant. And what this law tells us is that volume is directly proportional to the number of moles.