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In the balanced chemical equation for the formation of water from hydrogen and oxygen, how many water molecules are on the product side?

Answer and explanation

Correct answer: Two

The balanced equation is \(2\mathrm{H_2} + \mathrm{O_2} \rightarrow 2\mathrm{H_2O}\). Since \(\mathrm{O_2}\) contains two oxygen atoms, \(2\mathrm{H_2O}\) must be written on the product side. This also balances the four hydrogen atoms. Writing only one water molecule would leave the oxygen atoms unbalanced.

Related tags

ScienceClass 10Chemical ReactionsBalancing EquationsWater Formation

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