My ➡MgO ➡Mg(OH)2➡MgCO3

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The reaction sequence you have given involves converting magnesium oxide (MgO) into magnesium hydroxide (Mg(OH)2) and further into magnesium carbonate (MgCO3).

The first step involves adding water to magnesium oxide to form magnesium hydroxide:

MgO + H2O -> Mg(OH)2

The second step involves reacting magnesium hydroxide with carbon dioxide from the atmosphere to form magnesium carbonate:

Mg(OH)2 + CO2 -> MgCO3

Overall, the complete reaction sequence is:

MgO + H2O -> Mg(OH)2
Mg(OH)2 + CO2 -> MgCO3

This reaction sequence can be useful in various industrial processes and chemical applications.