Problem page solid magnesium carbonate decomposes into carbon dioxide gas and solid magnesium oxide . write a balanced chemical equation for this reaction.

                  MgCO₃   →    MgO  +  CO₂

                    Chemical Formula of Magnesium Carbonate  =  MgCO₃

                    Chemical Formula of Magnesium Oxide  =  MgO

                    Chemical Formula of Carbon Dioxide  =  CO₂

Step 1: Write the unbalance (if present) chemical equation:

                                             MgCO₃    →    MgO  +  CO₂

Step 2: Calculate and balance number of atoms on each side:

Magnesium Atoms:

                              As there is one Mg on left hand side and one Mg atom on right hand side. Therefore, Mg atoms are balanced.

Carbon Atoms:

                       There is one C atom on right hand side of the equation and one C atom on left hand side of the equation. Hence, C atoms are balanced too.

Oxygen Atoms:

                        Oxygen atoms are also balances i.e. three atoms on both sides each.

                   Hence, 1 mole of MgCO₃ on decomposition produces 1 mole of CO₂ and 1 mole of MgO.