CH4 + 2 O2 → CO2 + 2 H2O
Balanced equation based on its stoichiometry,
2NH3 + 3CuO —> 3Cu + 3H2O + N2
Example 2 Sulphur trioxide gas is released on combustion of iron pyrites(FeS2). Describe the chemical reaction and balance the equation based on stoichiometry of every compound.
Solution: The chemical reaction for the above example is
FeS2 + O2 —> Fe2O3 + SO3
Combustion compounds react with oxygen.
The balanced chemical equation based on its stoichiometry is
4FeS2 + 15O2 —> 2Fe2O3 + 8SO3
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