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Q 1117701680.     At `27° C` hydrogen is leaked through a tiny hole into a vessel for `20` min. Another unknown gas at the same temperature and pressure as that of hydrogen is leaked through same hole for `20` min. After the effusion of the gases the mixture exerts a pressure of `6` atm. The hydrogen content of the mixture is `0.7` mole. If the volume of the container is `3` L, find the molecular weight of the unknown gas.
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