Error:
NaOH %2B H2O2 %2B Cr%28NO3%293 %3D H2O %2B NaNO3 %2B Na2CrO4
^
Unexpected character ('%')NaOH %2B H2O2 %2B Cr%28NO3%293 %3D H2O %2B NaNO3 %2B Na2CrO4
^
Unexpected character ('%')