What Is the Oxidation Number Change for the Bromine Atom

question 4

Multiple Choice

What is the oxidation number change for the bromine atom in the following unbalanced reduction half reaction?
Br O₃^- (aq) + H⁺(aq) → Br^-(aq) + H₂O(l)

• A)-7
• B)- 6
• C)+ 6
• D)+ 7

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