4Al+3O2=2Al2O3
2Na+Cl2=2NaCl
3Mg+N2=Mg3N2
2P+3S=P2S3
2Ca+O2=2CaO
2Al+3S=Al2S3
Ca+H2=CaH2
4Fe+3Br2=2Fe2Br3
перепроверьте)
Объяснение:
1) 4Al + 3O2 = 2Al2O3
2) 2Na + Cl2 = 2NaCl
3) 3Mg + N2 = Mg3N2
4) 2P + 3S = P2S3
5) 2Ca + O2 = 2CaO
6) 2Al + 3S = Al2S3
7) Ca + H2 = CaH2
8) 2Fe + 3Br2 = 2FeBr3