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Problem- What is the total number of moles (n) of electrons exchanged between the oxidizing agent and the reducing agent in the overall redox equation: Cr2O72-(aq) + 6Fe2+(aq) + 14H+(aq) ? 2Cr3+(aq) + 6Fe3+(aq) + 7H2O(l)?

1, 2, 6, 3, 12

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