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For each of the following redox reactions in the, identify the oxidizing agent and the reducing...

For each of the following redox reactions in the, identify the oxidizing agent and the reducing agent.
2Na(aq)+2H2O(l)→2NaOH(aq)+H2(g)
C(s)+O2(g)→CO2(g)
2MnO−4(aq)+5SO2(g)+2H2O(l)→2Mn2+(aq)+5SO2−4(aq)+4H+(aq)

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