That's how you find moles. The second step is the same exact step, except it's for ethylene glycol. Now we have to look up the density of ethylene glycol and the molecular formula for ethylene glycol. So we follow the same exact steps, 100 ML, because we have 100 times 1.15 gives us the amount of cancer, 115 grams of ethylene glycol. So a little bit more than water. Our second step is to find the molecular weight of ethylene glycol.