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The vapour pressure of acetone at a cert...

The vapour pressure of acetone at a certain temperature is 480 mm of Hg. A non- volatile, non- electrolyte solid weighing 0.2 g when added to 5.8 g of acetone, the vapour pressure of the solution becomes 470 mm of Hg. The molar mass of the solute is

A

170 g/mol

B

94 g/mol

C

188 g/mol

D

72 g/mol

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