Question

why is average kinetic energy independent of mass​

Answer 1

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Now here is an unexpected fact: the average kinetic energies of molecules of any gas at the same temperature are equal (since KE = 3/2kT, the identity of the gas does not matter). So the average speed at which an atom or molecule moves depends on its mass.

Answer 2

Answer:

Now here is an unexpected fact: the average kinetic energies of molecules of any gas at the same temperature are equal (since KE = 3/2kT, the identity of the gas does not matter). So the average speed at which an atom or molecule moves depends on its mass