How many moles of H 2 molecules are needed to convert 5 mol of O
How many moles of H2 molecules are needed to convert 5 mol of O2 molecules to water?
- A) 5 mol H2
- B) 10 mol H2
- C) 15 mol H2
- D) 20 mol H2
Correct Answer: B) 10 mol H2
Explanation
To answer this question, we need to understand the balanced chemical equation for the formation of water from hydrogen and oxygen:
\(2H_2 + O_2 \rightarrow 2H_2O\)
This balanced equation tells us that 2 moles of hydrogen molecules (H\(_2\) react with 1 mole of oxygen molecules (O\(_2\) to produce 2 moles of water molecules (H\(_2\)O).
Now, we are given that there are 5 moles of O\(_2\) molecules. According to the balanced equation, 2 moles of H\(_2\) are required for 1 mole of O\(_2\). Therefore, to react with 5 moles of O\(_2\), we would need:
\(5 \text{ moles of } O_2 \times \frac{2 \text{ moles of } H_2}{1 \text{ mole of } O_2} = 10 \text{ moles of } H_2\)
So,10 moles of H\(_2\) are needed to convert 5 moles of O\(_2\) molecules to water, which corresponds toOption B.