This will help us find the number of moles of glucose within our solution. The first step is to find the atomic weight of each atom and multiplied by each subscript. So the atomic weight of carbon is 12 grams/mol, the atomic weight of H is 1 gram/mol, and the atomic weight of oxygen is 16 grams/mol. So we multiply six by twelve, add that to twelve times one and add that to six times 16 and we get approximately 180 grams/mol. Now, using this number, we can take our 90 grams of glucose and find the number of moles. 90 grams of glucose divided by 180 grams of glucose per mole gets us 0.5
or one half moles of glucose.