I mean, we have four knowns and one unknown. And that means if we plug the four knowns in, we'll get our unknown, namely our constant R.
So let's plug these guys in P times V divided by T times N. Simply rearrange these guys, plug our values in, and we get our gas constant R is equal to 0.826 atmospheres times literally by Kelvin times Mo. Now, this number might change if we play around with the units. But for these units, this will be our gas constant. So the question is how does an ideal gas law help us? Well, it helps us in the following way.