C →¹ СО₂ →² MgCO₃ →³ СО₂ →⁴ CaCO₃
1) С + O₂ → CO₂↑
2) CO₂ + MgO → MgCO₃
3) 2MgCO3 = 2Mg + 3CO₂↑
4) CO₂ + CaO → CaCO₃↓
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C →¹ СО₂ →² MgCO₃ →³ СО₂ →⁴ CaCO₃
1) С + O₂ → CO₂↑
2) CO₂ + MgO → MgCO₃
3) 2MgCO3 = 2Mg + 3CO₂↑
4) CO₂ + CaO → CaCO₃↓