Error:
K2MnO4 %2B HBr %3D H2O %2B Br2 %2B KBr %2B MnBr2
^
Unexpected character ('%')K2MnO4 %2B HBr %3D H2O %2B Br2 %2B KBr %2B MnBr2
^
Unexpected character ('%')