57. Use the combined gas law to complete the table (assume the number of moles of gas to be constant): P1 1.21atm 721 torr 5.51 atm V1 1.58 L 141 ml 0.879 L T1 12.20 135 K 22.15 P2 1.54 atm 801 torr 73. A gas mixture contains each gas at the indicated partial pressure. N2 217 torr 02 106 torr He 248 torr What is the total pressure of the mixture? 83 Calculate the volume of each gas sample at STP. (a) 22.5 mol cl2 (b) 3.6 mol nitrogen (c) 2.2 mol helium (d) 27 mol CH4 V2 152MI 1.05 L T2 32.3 38.30