Error:
Cr %2B NaNO3 %2B NaOH %3D NaNO2 %2B Na2CrO4 %2B H2O
^
Unexpected character ('%')Cr %2B NaNO3 %2B NaOH %3D NaNO2 %2B Na2CrO4 %2B H2O
^
Unexpected character ('%')