Hi Lana,
This problem is asking you to use the chemical equation to determine the amount of water that is produced when sulfur (S) is combined with Nitric Acid (HNO3). The problem statement gives you an amount of Nitric Acid, and you can use the chemical equation to setup a proportion to compare the amount of the reactant Nitric Acid to the amount of the product of water. The table of molar masses is provided to remind you to be cautious when comparing reactants to products. The amounts of each chemical (Sulfur, Nitric Acid, Water, etc.) in the equation are given in terms of moles, so you will need to convert your mass of Nitric Acid into the appropriate unit.
Good luck and I hope this helps,
Nick