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Three 6 L flasks, fixed with pressure gauges and small valves, each contain 3 g of...

Three 6 L flasks, fixed with pressure gauges and small valves, each contain 3 g of gas at 273 K. Flask A contains He, flask B contains H2, and flask C contains CH4. Rank the flask contents in terms of the following properties. (Use the notation >, <, or =, for example B=C>A.)
(a) pressure0
(b) average molecular kinetic energy
(c) diffusion rate after the valve is opened
(d) total kinetic energy of the molecules
(e) density
(f) collision frequency

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