9) Determine if each of the reactions below is a redox reaction. If they are redox reactions, identify the substances being oxidized and reduced. a. 2Mg(s) + O2(g) → 2MgO(s) b. 2AGNO3(aq) + Cu(s) → Cu(NO3)2(aq) + 2Ag(s) c. CaO(s) + CO2(g) → CaCO3(s)

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