 OK, so this is one of those empirical formula problems. So it gives you the empirical formula. It says an organic compound which has the empirical formula CHO at the molar mass of 232 grams per mole. The molecular formula of the compound is what? So it's asking you, what is the molecular formula of this compound? So how do I do a problem like this? Anyways, I have the empirical formula up here. So what I do is figure out what the empirical mass of this formula is first. So let's go about doing that. So this is, we can imagine, one molecule here. If you want to think about the molecular weight of this thing, it's going to be 232. So the empirical mass is 12.01 ammule plus 1.008 ammule plus 16.00 ammule. And add that up, 12.01 plus 1.008 plus 29.00. So that's the empirical mass of CHO. And we got the molecular weight of the compound itself. So what we need to do now to figure out, well, what is the molecular formula of this thing is we need to create a ratio using the molecular weight and the empirical mass. So the ratio is going to be the bigger of the two numbers over the smaller. I do that. I get 7.99, and that's essentially 8, because we're looking for the whole number ratio. So in order to get the molecular formula, what I'll do is take the empirical formula and multiply it by 8. Remembering when I'm doing this, I'm multiplying this subscript. So that's going to go to C8H8O8. So that's the molecular weight. Any questions on how to do that or why do you do it? OK, cool. See you guys.