What Is the Oxidation Number Change for the Manganese Atom

question 53

Multiple Choice

What is the oxidation number change for the manganese atom in the following unbalanced reduction half-reaction:
Mn O₄^- (aq) + H⁺(aq) → Mn²⁺(aq) + H₂O(l)

• A)-7
• B)-5
• C)+5
• D)+7

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