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please help step by step 1. Determine the oxidation number of each of the elements that is underlined: a) Co(H2O63+ b) Sr(BrO2)2 c) Na2O2 d)

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1. Determine the oxidation number of each of the elements that is underlined: a) Co(H2O63+ b) Sr(BrO2)2 c) Na2O2 d) BrO4 e) Pt(H2O)5(OH)2+ 2. Using the change in oxidation number to determine which elements are oxidized and which are reduced in these reactions. Identify the oxidizing agent and the reducing agent. a) Sb(s)+HNO3(aq)Sb2O3(s)+NO(g)+H2O(l) b) As2O3(s)+HNO3(aq)+H2O(l)H3ASO4(aq)+NO(g)

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