00:01
Okay, we were asked to find the percent composition of c3h9n.
00:06
So i'm going to just break it down by each element, because i need to know how much mass each element has.
00:15
So there's three carbon, and carbon has a molar mass of 12 .01 grams per mole, which means there's a total of 36 .3 grams in one mole of carbon.
00:28
For hydrogen, i have nine times the molar mass 1 .01 grams per mole, which gives me 9 .09 grams of hydrogen in one mole.
00:41
We have one nitrogen with a molar mass of 14 .01 grams per mole, which gives me 14 .01 grams of nitrogen.
00:51
That gives me a total of 59 .13 grams per mole of the c3h.
01:02
So to find the percent of carbon, i'm going to take the mass of carbon in it, divided by the total mass times 100, and that gives me 60 .93 percent carbon...