Calculate the percentage by mass of oxygen in ammonium nitrate (NH4NO3) Relative atomic masses (Ar):
H= 1 N = 14
O = 16
Relative formula mass (M): NH4NO3 = 80

Answer

35%

1 Answer. Percent composition of N is 35% . Percent composition of H is 5% . Percent composition of O is 60% .

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