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Completati spatiile libere..
Ca + ... = CaO
... + S = Al2S3
Zn + ... = ZnCl2 + H2
MgO + ... =MgSO4 + H2O
Na + Cl2 = ...
Fe + S= ...
... + F2 = HF

Multumesc anticipat !


Răspuns :

Ca+O=CaO
Al+S=Al2S3
Zn+Cl=ZnCl2+H2
MgO+SO=MgSO4+H2O
Na+Cl2=ClNa2 
Fe+SO=FeSO


2Ca+O2=2CaO
2Al+3S=Al2S3
Zn+2HCl=ZnCl2+H2
MgO+H2SO4=MgSO4+H2O
2Na+Cl2=2NaCl
2Fe+3S=Fe2S3
H2+F2=2HF