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MHT CET202014 Oct 2020Evening ShiftChemistrySome Basic Concepts of ChemistryActual

What is the molality of a solution containing 300 mg of urea (molar mass 60 ) dissolved in 30 ~g of water?

Options

  1. A0.133 ~m
  2. B0.825 ~m
  3. C0.498 ~m
  4. D0.166 ~m

Correct answer

D. 0.166 ~m

Step-by-step solution

h=0.3 / 60=0.005 Molality = number of moles of solute/ mass of solvent in kg =0.005 / 0.03=1.166 ~m

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