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amandine60860
@amandine60860
January 2021
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Bonsoir je ne comprends pasles exercices 9 et 11 de la page
Merci d avance
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PetiteFraise
Exercice 9:
1) Un atome de fer se note Fe
2) 4 ions Fe (III) se note 4Fe3+ (3+ en puissance)
3) Trois ions Cu (II) se note 3Cu2+ (2+ en puissance)
4) Un ion chlorure se note Cl-
5) Deux ions Fe (III) se note 2Fe3+
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PetiteFraise
Exercice 11:
PetiteFraise
ions positifs: Fe3+, O2, Cu2+, Zn2+
PetiteFraise
ions négatifs: Cl-, S2-, F-, Al3-
PetiteFraise
2) o2, Zn2+, Cu2+, Fe3+
PetiteFraise
3) F-, Cl-, S2-, Al3-
PetiteFraise
voila :)
amandine60860
Vraiment merci beaucoup je suis super nul en sciences physiques
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1) Un atome de fer se note Fe
2) 4 ions Fe (III) se note 4Fe3+ (3+ en puissance)
3) Trois ions Cu (II) se note 3Cu2+ (2+ en puissance)
4) Un ion chlorure se note Cl-
5) Deux ions Fe (III) se note 2Fe3+