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Chemistry · May / June 2024 · Paper 12 · Question 31

5070The mole and the Avogadro constant

Ammonium phosphate, (NH4)3PO4, may be used as a fertiliser. What is the percentage by mass of elements that improve plant growth in ammonium phosphate?

  1. A9
  2. B21
  3. C28
  4. D49

As printed in the paper

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Correct answer: D. 49

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