So we take our volume of 100 MLS multiplied by 1 gram per ML the MLS can't sell and we get 100 grams of water in our beaker. Now, in the second step, we have to find the molecular weight of water. To find a molecular weight of water, we simply add up the atomic weights. So oxygen is 16 grams/mol plus two times because we have a substitute to 1 gram per mole, gives us 18 grams/mol. So the molecular weight of water is 18 grams/mol. Finally, we take this guy divided by this guy and we get 5.56
moles of water.