Oxygen for hospital patients is kept in special tanks, where the oxgen has a pressure of 65.0 atm and a temp. of 288 K. The tanks are stored in a separate room, and the oxygen is pumped to the patient's room, where it is administered at a pressure of 1.00 atm and a temp. of 297 K. What volume does 1.00 m^3 of oxygen in the tanks occupy at the conditions in the patient's room? What I did was solve for the # of mols (n) given the tank information: n= PV/RT and used this n value to solve for volume: V= nRT/P. But I got 67 m^3 which is a much larger number than I expected. Am I heading in the right direction on this problem? Thanks!