So, multiplied by zero point 250 liters, and we get zero point 25 moles of sodium hydroxide. Because the liters cancel, the second step is to find the grams of sodium hydroxide. To find the grams, we must first find the molecular weight of sodium hydroxide. To find a molecular weight, we simply add up the atomic weight of each atom. So, 23 moles per gram, or grams per mole for sodium, plus 16 grams/mol for oxygen, plus 1 gram/mol for h, and we get 40 grams/mol times the number of moles. Moles cancel, and we get 10 grams of sodium hydroxide mixed into our solution.