 So in the last problem, we just calculated the molar mass of sucrose, so let's just leave that up there. So let's go to the next problem and see how many moles of sucrose are in a tablespoon containing 2.85 grams of substance. So it gives us the mass of sucrose in this problem, 2.85 grams. And it wants us to tell you how many moles of the substance there is. So hopefully you remember whenever you have one of these ratios, that's what we call a conversion factor in chemistry, right? So you can use that conversion factor to take this one in particular, the molar mass, to take grams to moles or moles to grams, right? So we have grams here and we have a molar mass of the same substance. So we can use that particular conversion factor to do this conversion. So let's do that. So what we're going to do, remember we're trying to cancel out grams and get moles. So we're going to put grams on the bottom, right? So 342.30 grams. And if you want to, you can put sucrose and sucrose. I just didn't do it this time. And one mole of sucrose. So cancel, cancel. So let's write it in scientific notation, okay? So to three sig figs, 8.33 times 10. So that's less than one, right guys? So it's going to be a negative exponent, right? So the negative one, two, three moles of sucrose. Everybody okay with that? So remember, you know the conversion factor from grams to moles, right? It's called the molar mass.