Fehler:
HNO2 %2B HBrO3 %3D HNO3 %2B H2O %2B Br2
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Unerwartets Zeichen ('%')HNO2 %2B HBrO3 %3D HNO3 %2B H2O %2B Br2
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Unerwartets Zeichen ('%')