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Chemistry · Oct / Nov 2024 · Paper 12 · Question 11

5070The mole and the Avogadro constant

Which fertiliser contains the highest percentage by mass of nitrogen? [Mr: NH4NO3, 80; (NH4)3PO4, 149; (NH4)2SO4, 132; (NH2)2CO, 60]

  1. ANH4NO3
  2. B(NH4)3PO4
  3. C(NH4)2SO4
  4. D(NH2)2CO

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Correct answer: D. (NH2)2CO

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