Question

balance reaction by oxidation number
method.
a)Mn4^_(aq)+Br^_(aq)arrow Mno2(s)+Bro3^_(aq)
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Answer 1

Answer:

2MnO4- + Br- + H2O → 2MnO2 + BrO3- + 2OH-

Answer 2

I guess ur Q must have be more clear or maybe u should have click a shot and post it.

but still I hope it could help u.

2MnO4- + Br- + H2O ---> 2MnO2 + BrO3- + 2OH-