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At 27^(@) C, H(2) is leaked through a ti...

At `27^(@) C`, `H_(2)` is leaked through a tiny hole into a vessel for 20 minutes Another unknown gas at the same T and P as that of `H_2` is leaked through the same hole for 20 minutes. After effusion of the gas, the mixture exerts a pressure of 6 atm. The `H_2` content of the mixture is 0.7 moles. If volume of the container is 3 litres what is the molecular weight of unknown gas ?

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