A methane-powered car has a fuel tank that fits in a space 1.00 x 1.00 x 0.50 m in dimension. The maximum safe pressure in the tank is 200 bar. Fuel will not flow from the tank to the engine unless the tank pressure is at least 2.0 bar. Assuming that methane behaves as an Ideal Gas answer the following questions.

a) At 298 K the tank holds ___ moles of methane.

b) The molar volume of methane under these conditions is ___ L/mole.

c) The usable amount of methane is ___ moles.