расставьте коэффициенты
Al + Cl2 → Al Cl3
Fe2 O3 → Al2 O3 + Fe
Na + Cl2 →Na Cl
N2 + H2 → N H3
K + S → K2 S
Fe + O2 → Fe3 O4
H2O → H2 + O2
Ca + H Cl → Ca Cl2 + H2
Ag Br → Ag + Br2
Al + S → Al2 S3
Pb + O2 → Pb O
Ca + Cl 2 → Ca Cl2
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