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JEE Main20231 Feb 2023Morning ShiftChemistrySome Basic Concepts of ChemistryActual

The density of 3 M solution of NaCl is 1 . 0 g mL - 1 . Molality of the solution is _ _ _ _ _ _ × 10 - 2 m (Nearest integer). Given: Molar mass of Na and Cl is 23 and 35 . 5 g mol - 1 respectively.

Correct answer

0

Step-by-step solution

Formula unit mass of sodium chloride = 23   +   35 . 5   gmol - 1   =   58 . 5   gmol - 1 ∴ m ( molality ) = 1000 × M 1000 × d - M × M . W  of solute  ... ( M   =   Molarity   of   solution ) = 1000 × 3 1000 × 1 - ( 3 × 58 . 5 ) = 3 . 64 = 364 × 10 - 2

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