That basically means as long as our pressure and temperature are the same, this will always be true for any volume or for any number of moles. This will always be our constant. And we'll see why this is important in Part D. Let's look at C for a second. It's important to mention that experimental results show that a zero degree Celsius or 273 Kelvin and 1 ATM and pressure 1 mol of any gas, any gas whatsoever, will always correspond to 22.4
liters. And that's because according to our Kinetic Molecular Theory, volume of gas is zero. It's assumed to be zero.