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The vapour pressure of ether at 20^(@)C ...

The vapour pressure of ether at `20^(@)C` is 442 mm. When 7.2 g of a solute is dissolved in 60 g ether, vapour pressure is lowered by 32 units. If molecular mass of ether is 74 then molecular mass of solute is:

A

113.77 g/mole

B

150.35 g/mole

C

116.23 g/mole

D

190.26 g/mole

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The correct Answer is:
A
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