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Balance the following in basic solution: a) O2 (g) + Mn(OH)2 (s) ⟶ MnO2 (s) b)...

Balance the following in basic solution:

a) O2 (g) + Mn(OH)2 (s) ⟶ MnO2 (s)

b) NO3 −(aq) + H2 (g) ⟶ NO(g)

Please show step by step. thank you!

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