Essential Chemistry for IGCSE - Formulae And Equations (Section 3 - No. 6)
Which of the following represent a balanced chemical equation?
H2 + O2 -> H2O
H2 + O2 -> 2H2O
2H2 + O2 -> H2O
2H2 + O2 -> 2H2O
Explanation
The correct balanced equation is 2H2 + O2 -> 2H2O.
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