Error:
Fe %2B KMnO4 %2B HCl %3D Fe%28MnO4%293 %2B MnO2 %2B KCl %2B H2O
^
Unexpected character ('%')Fe %2B KMnO4 %2B HCl %3D Fe%28MnO4%293 %2B MnO2 %2B KCl %2B H2O
^
Unexpected character ('%')