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Balance the following redox equations by the ion-electron half-reaction method: (a) (acid solution): NO3– + I–...

Balance the following redox equations by the ion-electron half-reaction method:

(a) (acid solution): NO3– + I– → NO + I2

(b) (acid solution): Cr2O72– + Fe2+ → Cr3+ + Fe3+

(c) (basic solution): Au(s) + CN– + O2 (g) → Au(CN)2–

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