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What is the molality of an aqueous solution containing 6 % glucose by mass ? ( Molar mass of glucose = 180 g/mol )

Options

  1. A0.15 m
  2. B0.25 m
  3. C0.35 m
  4. D0.45 m

Correct answer

C. 0.35 m

Step-by-step solution

Let the mass of the solution be 100 g. Mass of glucose (solute) = 6 g Mass of water (solvent) = 100 - 6 = 94 g = 0.094 kg Molar mass of glucose = 180 g/mol Moles of glucose = 6 180 = 1 30 mol Molality ( m ) = Moles of solute Mass of solvent in kg m = 1/30 0.094 = 1 2.82 0.35 m Answer: 0.35 m

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