A vessel of volume 20 L contains a mixtu...

A vessel of volume `20 L` contains a mixture o hydrogen and helium at temperature of `27^(@)C` and pressure `2.0 atm` The mass of the mixture is `5 g`. Assuming the gases to be ideal, the ratio of the mass of hydrogen to heat of helium in the given mixture will be

`1:2`

`2:3`

`2:1`

`2:5`

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