A2.00 l container of gas has a pressure of 1.00 atm at 300 k. the temperature of the gas is halved to 150k, and the measured pressure of the same 2.00 liter sample is 0.420 atm. which of the following is the best explanation for these observations? a. pressure is proportional to temperature for a fixed volume of gas. b. the molecules of the gas occupy a significant portion of the volume. c. the molecules of the gas have negligible volume of their own. d. the molecules have significant attractive forces at 150 k. e. the gas is closer to an ideal gas at 150 k.