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. We follow the same exact step, we add up the atomic weights and we get 62 grams/mol. Finally, to find the moles, we take our amount in grams divided by our molecular formula and we get 115 divided by 62 equals 1.85 moles of ethylene glycol. Finally, we use our formula to find out vapor pressure of the water molecules in this system.