00:01
We are given the chemical reaction you see right here.
00:03
This is a balanced chemical reaction.
00:06
We are told that we have 7 .08 grams of copper and 4 .92 grams of hydrogen.
00:21
We are asked how much is what is the limiting reactant? and we're asked how much excess.
00:44
And i have to go look at something super quick before i continue.
00:48
What is the limiting reactant? how much is an excess? okay.
00:57
So let's begin.
00:59
I'm going to do this by converting each of these to first moles of my ethane and then i'm going to figure out when i find out which one is limiting, i will use that to find out how much of the other reactant i use.
01:18
So let's begin.
01:23
I have 7 .08 grams of carbon.
01:26
I have 4 .92 grams of water.
01:33
I'm going to convert these each.
01:36
2 moles of ethane.
01:50
My mole ratio is 1 to 2 for that reaction.
02:08
My mole ratio for the water is 1 to 3.
02:19
Let me do my math, our math i should say.
02:26
7 .08 divided by 12 .01 divided by 2.
02:34
I get 0 .29475, i'll round later.
02:46
Moles.
02:48
For my second, 4 .92, divided by 18 .02 divided by 3.
02:57
I get 0 .0 -0 -910.
03:06
9101 moles...