dozen *K 14) A gas mixture contains 0.364 total moles of gas, and is composed of the following gases at the following partial pressures: N2-315 torr; 02 =134 torr; He = 219 torr How many moles of O2 are present in the mixture? A) 0.0730 B) 0.243 C) 0.172 D) 0.119 E) 0.121 15) A 2.0 L sample of gas at 20.00 C is heated until it expands to 4.0L. What is the new temperature of the gas sample?