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Balance each of the following redox reactions occurring in acidic solution. Express your answer as a chemical equation. Identify all of the phases in your answer.

Part A

Cr2O72-(aq)+Cu+(aq)→Cr3+(aq)+Cu2+(aq)

Part B

ClO-4(aq)+Cl-(aq)→ClO-3(aq)+Cl2(g)

Part C

MnO2(s)+Cu(s)→Cu2+(aq)+Mn2+(aq)

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