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.
Frequently asked questions
What is the correct answer to this question?
Two to one
Why is this the correct answer?
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.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
