Identify which substance is oxidized and which substance is reduced in each of the following redox reactions. (Express your answer as a chemical formula.) а. Са + Н2 — СаНz is oxidized. is reduced. b. 4NH3 + 302 → 2N2 + 6H2O is oxidized. is reduced. с. 2FeCl3 + Fe - ЗFеClz is oxidized. is reduced. d. 3Cu + 8HNO3 → 3Cu(NO3)2 + 2NO + 4H20 is oxidized. is reduced.

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Q: Consider

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