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2 Mg + O₂ --> 2 MgO
b) chlor + żelazo --> chlorek żelaza ( III )
3 Cl₂ + 2 Fe --> 2 FeCl₃
c) azot + tlen --> tlenek azotu ( I )
2 N₂ + O₂ --> 2 N₂O
d) glin + siarka --> siarczek glinu
2 Al + 3 S --> Al₂S₃
2Fe + 3Cl2 -------> 2FeCl3
2N2 + 02 ----------> 2N20
2Al + 3S ------> Al2S3