We assume the gas is an ideal gas therefore we can use the ideal
gas equation to solve the problem. The ideal gas equation is expressed as PV =
nRT where P is the pressure, V is the volume, n is the number of moles, R is
the universal gas constant and T is the temperature.
V=nRT/P = 0.450 x 8314.472 x 300 / 200
V=5612.27 cm^3
