How many moles of water (H2O) would be produced if 10 moles of O2 gas reacted completely with excess H2 gas?

\[2 \, \text{H}_2(g) + \text{O}_2(g) \rightarrow 2 \, \text{H}_2\text{O}(g)\]

A. 5
B. 10
C. 20
D. 30

2 H2(g) + O2(g) → 2 H2O(g)
according to the reaction: 1 mole of O2-----------------2 moles of H2O 10 moles of O2--------------------- x x = 20 mole of H2O
answer: C

Answered by pyromorphite | 2024-06-10

C. 20 ;

Answered by castelloncarla | 2024-06-12

If 10 moles of O2 gas react completely with excess H2 gas, they will produce 20 moles of water (H2O). The balanced chemical equation shows that 1 mole of O2 produces 2 moles of H2O. Hence, the correct answer is C. 20.
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Answered by castelloncarla | 2024-10-10