Error:
FeI2 %2B HNO3 %3D Fe%28NO3%293 %2B HIO3 %2B NO %2B H2O
^Unexpected character ('%')FeI2 %2B HNO3 %3D Fe%28NO3%293 %2B HIO3 %2B NO %2B H2O
^Unexpected character ('%')