In the decomposition 2KClO₃ → 2KCl + 3O₂, how many moles of oxygen are produced from 4 mol of KClO₃?
Correct answer B. 6 mol
Explanation
The balanced equation gives a mole ratio KClO₃ : O₂ of 2 : 3, so 4 mol of KClO₃ produces 4 × 3/2 = 6 mol of O₂.
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