Fehler:
FeSO4 %2B Ba%28NO3%292 %3D BaSO4 %2B Fe%28NO3%292
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Unerwartets Zeichen ('%')FeSO4 %2B Ba%28NO3%292 %3D BaSO4 %2B Fe%28NO3%292
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Unerwartets Zeichen ('%')