Question: 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)

please help step by step
 please help step by step 1. Determine the oxidation number of

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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