00:01
Eshylin glycol commonly used as an automobile anti -freeze contains only carbon hydrogen and hydrogen.
00:14
So we're going to do the combustion analysis.
00:18
So it says right you have about 23 .46 milligrams a sample.
00:26
If you combust, it forms 20 .42 milligrams of the water and 33 .27 milligrams of carbon dioxide.
00:42
What is the empirical formula of the acolycone? so we know, right, this acolyclico will react with oxygen.
00:54
So since only acolyclico contains hydrogen and carbon, so we can know that hydrogen and carbon are all from the acyline glyco.
01:04
And oxygen are not necessary.
01:08
So the first thing is we can use the mass to calculate the morse of the hydrogen and the moist carbon that it contains here.
01:16
So let's see.
01:17
First we can calculate the more of the water that's equal to the mass of the water over the more mass of the water.
01:28
That's equal to 20 .42 milligrams.
01:37
So it's 20 .42 times 10 to minus 3 grams over the more mass.
01:48
The more mass is 18 here, so that's equal to 1 .134 times 10 to minus 3 more.
02:09
So that means the more of the hydrogen should be 2 more of the water.
02:16
That's 2 .268 times 10 to minus 3 more.
02:24
So the mass of the hydrogen will be the same because the hydrogen atomic weight is 1 for hydrogen.
02:32
So it's 2 .268 times 10 to minus 3 grams here...