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To an evacuated vessel movable piston under external pressure of1 atm, 0.1 mol of He and 1.0 mol of an unknown compound ( vapour pressure 0.68 atm, at 0^(@)C) are introduced. Considering the ideal gas behaviour , the total volume( in litre) of the gases at 0^(@)C is close to

Answer»


SOLUTION :`P_(He)=1-0.68=0.32 ATM`
`V=?`
`n=0.1, V= (nRT)/(P) = (0.1 xx 0.0821 xx 273)/(0.32)= 7`


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