A sample of xenon gas at a pressure of 704 mm Hg and a temperature of 45 °C, occupies a volume of 12.6 liters. If the gas is cooled at constant pressure to a temperature of 21 °C, the volume of the gas sample will be___ L.

Answer 1

since PV= kT, you want V such that
V/(273+21) = 12.6/(273+45)