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In the balanced chemical equation for the formation of water, \(2\mathrm{H_2} + \mathrm{O_2} \rightarrow 2\mathrm{H_2O}\), what is the ratio of hydrogen molecules to oxygen molecules?

Answer and explanation

Correct answer: Two to one

In the balanced equation \(2\mathrm{H_2} + \mathrm{O_2} \rightarrow 2\mathrm{H_2O}\), the coefficient of \(\mathrm{H_2}\) is 2 and that of \(\mathrm{O_2}\) is 1. Therefore, the ratio of reacting hydrogen molecules to oxygen molecules is \(2:1\). This is different from comparing the numbers of hydrogen and oxygen atoms in the product.

Related tags

Chemical ReactionsBalanced EquationsWater FormationStoichiometryClass 10 Science

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