Error:
H2SO4 %2B Zn %2B SbCl3 %3D ZnSO4 %2B ZnCl2 %2B SbH3
^
Unexpected character ('%')H2SO4 %2B Zn %2B SbCl3 %3D ZnSO4 %2B ZnCl2 %2B SbH3
^
Unexpected character ('%')