Подберите и запишите коэффициенты в схемах химических реакций.
1)Li+O₂=Li₂O
2)Al+S=Al₂S₃
3)Ca+N₂=Ca₂N₃
4)Zn+O₂=ZnO
5)Al+Cl₂=AlCl₃
6)Na+H₂=NaH
7)Na+P=Na₃P
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