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2Ag₂O -------> 4Ag + O₂
b) żelazo + chlor-> chlorek żelaza (III)
2Fe + 3Cl₂ -------> 2FeCl₃
c) siarka + glin -> siarczek glinu
3S + 2Al -------> Al₂S₃
d) tlenek cynku + glin -> cynk + tlenek glinu
3ZnO + 2Al ----> 3 Zn + Al₂O₃
b) 2 Fe + 3 Cl₂ ---> 2 FeCl₃
c) 3 S + 2 Al ----> Al₂S₃
d) 3 ZnO + 2 Al ----> 3 Zn + Al₂O₃