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One mole of diborane (B2H6) is reacted with excess D2O. How many moles of HD gas are produced?
- 3
- 6
- 12
- 2
Correct answer: 6
Solution
B2H6 contains 6 B-H bonds. Each B-H bond reacts with one D2O molecule via protodeuteration: B-H + D2O -> B-OD + HD, yielding one mole of HD per mole of B-H bonds. Hence 1 mol B2H6 produces 6 mol HD.
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