the vapour pressure of pure benzene at a certain temperature is 200 mm HG at the same temperature the vapour pressure of a solution containing 2 gram of a non volatileand not love to live Tech solid in 78 gram of benzene is 195 mm what is the molecular mass of the solid
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Explanation:
Given p
o
=200mmHg
p=195mmHg
w= weight of solute = 2g
W= weight of solvent = 78 g
M= Molecular weight ofsolvent (benzene)=78
m= Molecular weight solute = ?
p
o
p
o
−p
=
W×m
w×M
or
200
200−195
=
78×m
2×78
or
200
5
=
m
2
∴m=80
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