Question

In the reaction \( 2\text{H}_2 + \text{O}_2 \rightarrow 2\text{H}_2\text{O} \), if 4 moles of hydrogen react with excess oxygen, how many moles of water are produced?

• A. 2 moles
• B. 4 moles
• C. 8 moles
• D. 1 mole

Hint:

Remember: In stoichiometry problems, use the mole ratio from the balanced chemical equation to convert between reactants and products.

Answer 1

The Correct Option is B

Given: \[ 2\text{H}_2 + \text{O}_2 \rightarrow 2\text{H}_2\text{O} \] The balanced equation indicates that 2 moles of hydrogen (\( \text{H}_2 \)) yield 2 moles of water (\( \text{H}_2\text{O} \)).

Mole Ratio: The mole ratio of hydrogen to water is 1:1. Consequently, 4 moles of hydrogen will produce 4 moles of water. 

Answer: Option (2) is the correct answer: 4 moles.