Расставьте коэффициенты в уравнения реакции и укажите их тип:
Na₂O+H₂O→NaOH
Fe₂O₃+C→Fe+C₂
CaCO₃→CaO+CO₂
N₂+H₂→NH₃
MnO₂+H₂→Mn+H₂O
Заранее спасибо!)
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