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Aluminiu +Sulf
Aluminiu+clor
Natriu+oxigen
Potasiu+sulf
Magneziu+OXIGEN
FE3+CLOR


Răspuns :

2Al+3S=>Al2S3
2Al+3Cl2=>2AlCl3
4Na+O2=>2Na2O
2K+S=>K2S
2Mg+O2=>2MgO
2Fe+3Cl2=>2FeCl3