Balance the following redox reactions by inserting the appropriate coefficients.

Question

Al + MnO2 --> Al2O3 + Mn

HNO3 + H2S --> NO + S + H20

Initially, I know the first step is to find assign all the oxidation numbers for the products and reactants listed, but am unsure if I got the right coefficients and how to approach the rest of the question from here on out. Any help would be greatly appreciated, thanks!

Answer 1

4Al + 3MnO2 --> 2Al2O3 + 3Mn