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2Sb + 3S → Sb₂S₃
2Cl₂O → 2Cl₂ + O₂
4Fe + 3O₂ → 2Fe₂O₃ lub 3Fe + 2O₂ → Fe₃O₄
2Cu₂O + C → 4Cu +CO₂
Cu₂O + H₂ → Cu + H₂O
2Sb + 3S-------->Sb₂S₃
2Cl₂O-------->2Cl₂ + O₂
4Fe + 3O₂-------->2Fe₂O₃...jedna z trzech opcji jest prawidłowa,
3Fe + 2O₂-------->Fe₃O₄.....na pewno niepowstanie Fe²O
2Fe + O₂-------->2FeO
2Cu₂O + C-------->4Cu +CO₂
Cu₂O + H₂-------->2Cu + H₂O