00:04
All right, to solve this problem, we're trying to figure out what the moles of nitrogen are in that compound from problem 33.
00:13
So we had the nh3 and we had the n2h4.
00:19
In nh3, the ammonia, there is one mole of nitrogen in that compound.
00:26
So if we want to figure out how many, what the mass will be if we have five moles, what we're going to start out with.
00:32
We have five moles of nitrogen.
00:39
I'm going to need to use the molar mass of nitrogen.
00:42
In this case, there's 14 .01 grams per mole.
00:46
So i know for every one mole, there is 14 .01 grams.
00:55
And so in this case, you'll multiply 14 .01 times five...