Error:
Ag3AsO4 %2B Zn %2B HCl %3D ZnCl2 %2B Ag %2B AsH3 %2B H2O
^Unexpected character ('%')Ag3AsO4 %2B Zn %2B HCl %3D ZnCl2 %2B Ag %2B AsH3 %2B H2O
^Unexpected character ('%')