1) mathrm(C)_(2) mathrm(O)_(2)+mathrm(Na)_(2) mathrm(NO)_(3)+mathrm(NaOH) arrow mathrm(Na)_(2) mathrm(CrO)_(4)+mathrm(NaNO)_(2)+mathrm(H)_(2) mathrm(O) 2) mathrm(K)_(2) mathrm(~S)^+ mathrm(KC) mathrm(MnO)_(4)+mathrm(H)_(2) mathrm(O) arrow mathrm(MnO)_(2)+mathrm(S)+mathrm(KOH)

Let's correct and balance the chemical equations step by step.1) 2) Now, let's balance the equations:1) 2) These equations are now balanced correctly.