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JEE Main levelNumerical answerDifficulty 2 of 3mc142

An aqueous urea solution () is 2.0 molal and has density . Find its molarity in , to two decimal places.

Numerical answer type, answer in mol/L, tolerance 0.01.

Answer: 1.84 mol/L

Take 1 kg of solvent: urea = 2.0 mol = 120 g, solution mass = 1120 g, volume = 1120/1.03 = 1087.4 mL. Molarity = 2.0/1.0874 L = 1.84 M.
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More questions on Concentration terms (molarity, molality, mole fraction, ppm) and dilution