So let's see how many moles 3.5 grams of glucose actually corresponds to. So we take our grams, 3.5 grams, divide that by our molecular formula for glucose, which is 180 grams/mol, and we get zero point 19 moles. So this number corresponds to only zero point 19 moles. We want to find how many joules corresponds to 1 mol of glucose. Okay? So we basically take our number and divide that by our moles, and that gives us 2,422,316 joules per mole.