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Five grams of helium having rms speed of...

Five grams of helium having rms speed of molecules `1000 m//s` and `24 g` of oxygen having rms speed of `1000 m//s` are introduced into a thermally isolated vessel. Find the rms speeds of helium and oxygen individually when thermal equilibrium is attained. Neglect the heat capacity of vessel.

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For helium, `100 = sqrt((3RT)/(M))`
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