2 g of a substance dissolved in 40 g of water produced a depression of 274.5 K in the freezing point of water. Calculate the molecular mass of the substance. The molal depression constant for water is 274.85 K per molal.

Dear Student, 
The value given is incorrect as depression cannot be 274.5 K, if that happens then freezing point of solution will be less than 0 K which is not possible.
Kindly check the value again and repost your question. 

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