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The molarity of urea (molar mass 60 g m o l - 1 ) solution obtained by dissolving 15 g of urea in 500 c m 3 of water is

Options

  1. A2 m o l d m - 3
  2. B0.5 m o l d m - 3
  3. C0.125 m o l d m - 3
  4. D0.0005 m o l d m - 3

Correct answer

B. 0.5 m o l d m - 3

Step-by-step solution

Urea molar mass = 6 0 g / mol molarity = 1 5 × 1 0 0 0 6 0 × 5 0 0 = 1 5 6 × 5 = 1 2 = 0.5 mol dm - 3

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