Fehler:
HNO3 %2B Al %3D H2O %2B N2 %2B N2O %2B Al%28NO3%293
^Unerwartets Zeichen ('%')HNO3 %2B Al %3D H2O %2B N2 %2B N2O %2B Al%28NO3%293
^Unerwartets Zeichen ('%')