Error:
Mn%28NO3%292 %2B Pb3O4 %2B HNO3 %3D Pb%28NO3%292 %2B HMnO4 %2B H2O
^Unexpected character ('%')Mn%28NO3%292 %2B Pb3O4 %2B HNO3 %3D Pb%28NO3%292 %2B HMnO4 %2B H2O
^Unexpected character ('%')