Circle answer and show all work complete with proper units and number of significant figures for full credit. (1) Calculate the root-mean-square velocity for the H2 molecules in a sample of He gas at 25C. (2 points) (R=8.3145J/K mol) (2) If a certain volume of methane, CH4, effuses through a small hole at a rate of 5.5106mol/hr, the rate of effusion for the same volume of xenon through the hole under the same conditions will be ( 2 points) (3) Suppose a Chinese spy balloon is filled so that its volume is 40.0L when the pressure is 740 , torr and the temperature is 25C. What volume will it occupy if it rises to an elevation where the pressure is 135 torr and the temperature is 30.C ? (3 points)