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Chemistry · May / June 2017 · Paper 11 · Question 12

5070The mole and the Avogadro constant

The formula for hydrated copper(II) nitrate is Cu(NO3)2.xH2O. It contains 36.5% water of crystallisation by mass. What is the value of x? [Ar: H, 1; N, 14; O, 16; Cu, 64]

  1. A4
  2. B5
  3. C6
  4. D7

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Correct answer: C. 6

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