Maybe you meant hydrogen peroxide and manganese dioxide?
in that case,
hydrogen peroxide: H2O2
manganese dioxide: MnO2
(H2O2) (MnO2) = (H2O) + (O2)
balancing,
H2O2 ^(raised to)-2 MnO2 = H2O + O2 [also written as]
H2O2 {-2}MnO2 = H2O + O2
otherwise, i may not be correct, sorry.
