00:01
From this ball and stick model, we can see that the formula for sucuric acid is c5, excuse me, c6, for the 6 gray balls, h8, drawing white, and 07 for the red circle shown.
00:24
Now, we are asked to find the percent composition, typically this is done by mass, so the mass percent composition.
00:35
And to do this, we're going to take advantage of the fact that we know this formula.
00:41
So we're going to make a really big assumption.
00:44
We're going to say that we have one mole of c6h807.
00:52
Because remember, we're working with percentages.
00:54
It doesn't matter if i have a gram, 100 grams, 1 ,000 grams a ton, or a mole, because all of these different quantities are going to have the same percentage of each part.
01:04
So if i have one mole of c6 h807, that means that for carbon, i have 6 times 12 .01 grams of carbon.
01:17
In other words, in other words, 72 .06 grams.
01:28
For hydrogen, i have 8 times 1 .00 grams.
01:32
That's 8 grams...