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.
Frequently asked questions
What is the correct answer to this question?
Two
Why is this the correct answer?
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.
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.
