Error:
HNO3 %2B FeCl2 %3D H2O %2B HCl %2B NO2 %2B Fe%28NO3%293
^
Unexpected character ('%')HNO3 %2B FeCl2 %3D H2O %2B HCl %2B NO2 %2B Fe%28NO3%293
^
Unexpected character ('%')