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JEE Main 202126 AugustMorning Shift
Exam
JEE Main
Year
2021
Date
26 August
Shift
Morning Shift
Subject
Chemistry
Chapter
Some Basic Concepts of Chemistry

JEE Main 2021 · 26 August · Morning Shift · Chemistry · Some Basic Concepts of Chemistry

An aqueous KCl solution of density 1 . 20g mL ^ - 1 has a molality...

An aqueous KClKCl solution of density 1.20gmL−11 . 20g{mL}^{- 1} has a molality of 3.30molkg−13 . 30mol{kg}^{- 1}. The molarity of the solution in molL−1{molL}^{- 1} is____.(The Nearest integer)
[[Molar mass of KCl=74.5g]KCl = 74 . 5g ]

Correct answer

0

Step-by-step solution

Molality (m)={M×10001000×d−M×Msolute}\left(m\right) = \left\{\dfrac{M \times 1000}{1000 \times d - M \times {M}_{\text{solute}}}\right\}

3.3=3 . 3 =\dfrac{M \times 1000}{1000 \times 1 . 20 - M \times 74 . 5}

3960−245.85M=1000M3960 - 245 . 85M = 1000M

1245.85M=39601245 . 85M = 3960

M=M =\dfrac{3960}{1245 . 85} =3.17≈3M3 . 17 \approx 3M

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