Complete and balance the following equations, and identify the oxidizing and reducing agents. Recall that the O atoms in hydrogen peroxide, H2O2, have an a typical oxidation state.
-NO2^1-(aq) + Cr2O7^2-(aq)-->Cr^3+(aq) + NO3^1- (aq) [acidic solution]
-S(s) + HNO3(aq) --> H2SO3(aq) + N2O(g) [acidic solution]
-H2O2(aq) + ClO2(aq) --> ClO2^1- (aq) + O2(g) [basic solution]