4 B + 3 O2 = 2 B2O3
4 Al + 3 O2 = 2 Al2O3
2 K + Cl2 = 2 KCl
2 Li + S = Li2S
2 Mg + O2 = 2 MgO
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4 B + 3 O2 = 2 B2O3
4 Al + 3 O2 = 2 Al2O3
2 K + Cl2 = 2 KCl
2 Li + S = Li2S
2 Mg + O2 = 2 MgO