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Chemistry · Oct / Nov 2018 · Paper 12 · Question 22

5070The mole and the Avogadro constant

Which fertiliser contains the highest percentage of nitrogen by mass?

  1. Aammonium nitrate, NH4NO3; formula mass is 80
  2. Bammonium phosphate, (NH4)3PO4; formula mass is 149
  3. Cammonium sulfate, (NH4)2SO4; formula mass is 132
  4. Dpotassium nitrate, KNO3; formula mass is 101

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Correct answer: A. ammonium nitrate, NH4NO3; formula mass is 80

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