In the following reaction using isotopic `.^(18)O` in `H_(2)O_(2),2MnO_(4)^(-)+3H_(2)O_(2)^(18)to2MnO_(2)+3O_(2)+2H_(2)O+2OH^(-)` isotopic oxygen goes

In the following reaction using isotopic .^(18)O in H_(2)O_(2), 2MnO_(4)^(-)+3H_(2)O_(2)^(18)rarr 2MnO_(2)+3O_(2)+2H_(2)O+2OH^(-) isotopic oxygen goes,

In the following reaction the isotopic oxygens- 2Mn O_(4)^(-) + 3H_(2)O_(2)^(18) rarr 2MnO_(2) + 3O_(2) + 2H_(2)O + 2OH^(-)

MnO_(2)+2KOH+(1)/(2)O_(2) to K_(2)MnO_(4)+H_(2)O

Balance the following equations by oxidation number method. MnO_(4)^(-)+H_(2)O_(2)+H^(+)toMn^(2+)+H_(2)O+O_(2)