1 FE+F2=FEF3 2 P+O2=P2O2
3 An+H2SO4=ZnSo4+H2
4 ZnS+O2=SO2+ZnO
5 O2+NO=NO2
6 NH3+O2=NO+H2O
7 P2O5 +C=P+COME
срочно решите поставлю 5 звёзд и лайк​
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