Calculate the mass of urea ( NH_2CONH_2 ) required in making 2.5 kg of 0.25 molal aqueous solution.

MHT CET Chemistry question

Calculate the mass of urea () required in making 2.5 kg of 0.25 molal aqueous solution.

Answer: (A)

0.25 molal means 0.25 mol (15 g) urea per kg of water, so for about 2.5 kg of solvent mass = 0.25 × 2.5 × 60 = 37.5 g (an exact mass

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Question ID VK-061234