Fehler:
H2SO4 %2B Zn %2B HClO4 %3D H2O %2B HCl %2B ZnSO4
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Unerwartets Zeichen ('%')H2SO4 %2B Zn %2B HClO4 %3D H2O %2B HCl %2B ZnSO4
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Unerwartets Zeichen ('%')