Help Gas Problem?

This can be solved using the ideal gas law, PV=nRT, where n =the number of moles of gas, and R is the gas constant 0.082 L*atm*/(mol*K). You'll need to convert the pressure to atmospheres (1atm=760torr), the volume to liters, and the temperature to Kelvin (1K=273 C). Solve for n and convert to molecules using Avagadro's number (1mole= 6.02x10^23 molecules). Good luck.