Error:
HgI2 %2B HNO3 %2B HCl %3D HgCl2 %2B HIO3 %2B NO %2B H2O
^Unexpected character ('%')HgI2 %2B HNO3 %2B HCl %3D HgCl2 %2B HIO3 %2B NO %2B H2O
^Unexpected character ('%')