Error:
AuCl3 %2B H2O2 %2B KOH %3D Au %2B O2 %2B KCl %2B H2O
^
Unexpected character ('%')AuCl3 %2B H2O2 %2B KOH %3D Au %2B O2 %2B KCl %2B H2O
^
Unexpected character ('%')