00:01
All right, in this problem, they are asking us to calculate a molar mass.
00:08
So we have an equation from the chapter that says molar mass is equal to mass times the constant r times temperature divided by pressure times volume.
00:27
Well, we think about density.
00:29
Density is mass over volume.
00:30
So i can replace the m over v in this equation with d for density.
00:36
And it becomes density times universal gas constant times t over p.
00:44
So i can just use those four variables to calculate molar mass.
00:50
Reading this problem, i see that density is 2 .32 grams per liter.
01:01
And we're at standard temperature and pressure...