00:01
Hi there.
00:02
In this problem, i am trying to find the mass in grams of krypton gas that i have.
00:13
The other information that i provided is that its pressure is 775 tor, and its temperature in celsius is 6 degrees celsius.
00:29
I'm going to go ahead and convert that to kelvin right away by adding 273, and i get 279 kelvin.
00:43
The volume of this gas is 57 .9 liters.
00:53
All right, let's think about what we can do here.
00:56
We know about the ideal gas equation.
01:01
It says pv equals nrt.
01:06
I could rearrange this to solve for number of moles of krypton.
01:13
So the number of moles is going to be pv divided by rt.
01:18
Once i get moles, i can use the molar mass of krypton to calculate how many grams i have.
01:26
So this sounds like a good plan.
01:28
Let's go ahead and put it into action.
01:31
So i want to take pv divided by rt.
01:35
So here we go.
01:36
Number of moles is going to be pressure times volume, it was 57 .9 liters.
01:57
Divided by r...