The first step is to find the molecular weight of water and this can be done by adding the atomic weight of oxygen plus two times the atomic weight of h to leo, a subscript of two. So two times 1 gram per mole plus 16 grams/mol gives us 18 grams/mol of water. Now we can use this molecular mass, we can multiply that by ten moles to get the amount in grams of water in our solution. So 18 times ten gives us 180. The moles cancel, we're left with grams. So 180 grams of water in our beaker.