 Okay, so say I have a sample of carbon disulfide that weighs 32.37 grams. Is there a conversion factor that we can find, or that might already be present on the board, that would convert grams to moles? Yes. Yes. What is that conversion factor called? Molar. The molar mass, okay? So we've got the molar mass of that, right? But we've got grams on top. So how do I do conversions, right? I'm going to have to multiply it by a ratio, right? So when I do that, what's going to be on the top? Yeah, one mole. And I like to say one mole of carbon disulfide just to kind of help myself out, keep my place. And on the bottom here, what's that going to be? 76.13 grams of carbon disulfide. And cancels my grams. Hopefully, everybody sees that. My calculator. 32.37 divided by 76.13. So I got 0.42 by 2 moles of carbon disulfide. Everybody's cool with that? Yes. So that is the first conversion factor that you guys already know from Chapter 3. Okay, so that's the first one you're going to learn. Everybody, any questions? I guess there should be. Questions, questions? Okay.