A gas mixture at `27^(@)C` and 1 atm contains equal masses of He,`H_(2),CO_(2)` and `CH_(4)`. How do their molecular velocities

A gas mixture at `27^(@)C` and 1 atm contains equal masses of He,`H_(2),CO_(2)` and `CH_(4)`. How do their molecular velocities compare?
A. `He=H_(2)=CO_(2)=CH^(4)`
B. `HeltH_(2)ltCO_(2)ltCH_(4)`
C. `H_(2)HeltCH_(4)ltCO_(2)`
D. `CO_(2)ltCH_(4)ltHeltH_(2)`

A gas mixture at `27^(@)C` and 1 atm contains equal masses of He,`H_(2),CO_(2)` and `CH_(4)`. How do their molecular velocities compare?

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