Определите типы химических реакций по уравнениям реакции.
А. 2Zn + О2 → 2ZnO

B. Mg + 2HBr → MgBr2 + H2

C. CaCO3 → CaO + CO2

D. BaO + 2HCl → BaCl2 +H2O ​
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