00:01
First, we'll start by assuming that we have 100 grams sample.
00:05
When we do that, we can change these percentages into grams, and then we'll divide each by the molar mass of that element.
00:18
This is 1 .01 grams for every mole of hydrogen.
00:23
12 .01 grams for every mole of carbon, 16 .0 for oxygen.
00:31
What this does is it changes the gram relationships into moles.
00:39
We have 4 .436, moles of 08, 996 for carbon, and 2 .20 for oxygen.
00:54
Notice that these are mole -to -mole relationships.
00:57
So we can write them as a formula.
00:59
Usually we write carbon and hydrogen and oxygen.
01:04
And we use the molar relationships in the subscript.
01:09
This is 4 .5.
01:14
Remember for formulas, we need whole number ratios.
01:18
We'll divide all of these in the smallest, off of subscript.
01:28
And what we get, we simplify these ratios.
01:31
There's 2 .25 for carbon.
01:36
You do as your hydrogen.
01:39
We're almost there, except that i can't round this value.
01:45
It's not close enough to a whole number...