1. If 1.9 moles of a gas are held in a container at 5.00 atm and 4.8x103 mL, what is the temperature of the gas?
2. What is the mass of 72.6 L of hydrogen gas held at a temperature of -48.0oC and a pressure of 680.4 mm Hg?
3. What is the molar mass of an unknown gas if 1.007 g of the gas exerts a pressure of 715 mm Hg at 23oC in a 452 mL flask?