Consider two gas cylinders of the same volume and temperature, one containing 1.0 mol of propane, c3h8, and the other 2.0 mol of methane, ch4. which of the following statements is true? consider two gas cylinders of the same volume and temperature, one containing 1.0 of propane, , and the other 2.0 of methane, . which of the following statements is true? the c3h8 and ch4 molecules have the same urms. the rate at which the molecules collide with the cylinder walls is the same for both cylinders. the c3h8 and ch4 molecules have the same average kinetic energy. the gas pressure is the same in both cylinders.