Chemistry 5070 · O Level · Relative masses of atoms and molecules

Relative masses of atoms and molecules — practice question

Ammonium phosphate, $(\text{NH}_4)_3\text{PO}_4$, can be used as a fertiliser. What percentage by mass is made up of the elements that promote plant growth in ammonium phosphate?

  • A9
  • B21
  • C28
  • D49

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