Error:
HMnO4 %2B HNO2 %3D Mn%28NO3%292 %2B HNO3 %2B H2O
^Unexpected character ('%')HMnO4 %2B HNO2 %3D Mn%28NO3%292 %2B HNO3 %2B H2O
^Unexpected character ('%')