This chemical reaction involves the decomposition of magnesium carbonate (MgCO3) into magnesium hydroxide (Mg(OH)2) and carbon dioxide (CO2) gas.

The balanced chemical equation is:
MgCO3 → Mg(OH)2 + CO2

This reaction can be represented in multiple steps:

Step 1: MgCO3 decomposes into MgO and CO2
MgCO3 → MgO + CO2

Step 2: MgO reacts with water (H2O) to form Mg(OH)2
MgO + H2O → Mg(OH)2

Overall reaction:
MgCO3 + H2O → Mg(OH)2 + CO2

Therefore, the final products of this reaction are magnesium hydroxide (Mg(OH)2) and carbon dioxide (CO2).