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JEE Main202126 Aug 2021Morning ShiftChemistrySome Basic Concepts of ChemistryActual

An aqueous KCl solution of density 1 . 20 g mL - 1 has a molality of 3 . 30 mol kg - 1 . The molarity of the solution in molL - 1 is____.(The Nearest integer) [ Molar mass of KCl = 74 . 5 g ]

Correct answer

0

Step-by-step solution

Molality m = M × 1000 1000 × d - M × M solute  3 . 3 = M × 1000 1000 × 1 . 20 - M × 74 . 5 3960 - 245 . 85 M = 1000 M 1245 . 85 M = 3960 M = 3960 1245 . 85 = 3 . 17 ≈ 3 M

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