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Question

How many moles of H2 will be needed to produce 6 moles of H2O when it reacts with excess of O2 ?

A
3
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B
4
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C
6
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D
5
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Solution

The correct option is C 6
The balanced chemical equation can be written as,
2H2 + O2 2H2O
2 mol 1 mol 2 mol
So, to form 6 moles of H2O, 6 moles of H2 will be required.

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