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MHT CET Chemistry question

ChemistrySolutionsMHT CET

The vapour pressure of acetone at 20 °C is 185 torr. When 1.2 g of a non-volatile substance was dissolved in 100 g of acetone at 20 °C, its vapour pressure was 183 torr. The molar mass () of the substance is

Answer: (B)

Solution

with mol gives mol, so $M =

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Question ID VK-061149