00:01
This is a molecular formula problem.
00:02
So we're going to start with our percent, which is 69 .42 percent carbon and 26 .42 percent oxygen.
00:13
The first thing we do is change the percent to gram.
00:17
So we're just going to change the sign from percent to gram.
00:21
The second thing we are going to do is gram to mole.
00:24
So we're going to divide by the molar mass.
00:27
So carbon's mass is 12 .01 grams of carbon, equals one mole of carbon.
00:32
Carbon.
00:34
When we divide those two, we end up with 5 .780 moles.
00:44
For oxygen, the mass of oxygen, is 16 .00.
00:48
Grams of oxygen equals one mole of oxygen.
00:51
The reason we're trying to get it to moles is we can compare them better.
00:55
So 26 .42 divided by 16.
00:59
And that gives us moles of 1 .651.
01:07
The next step then, is to divide by the smallest.
01:16
So of those two values, 1 .651 is the smallest.
01:20
So we're going to divide both of them by 1 .651.
01:25
And from fact, when we divide something by itself, we always get 1...