Question

Complete and balance the following chemical equations. Identify the reaction type as: combination, decomposition, single replacement, double replacement, or combustion.

Products:
Magnesium Oxide + Carbon dioxide.
a) MgCO₃ (Heat is supplied to the reaction (triangle over a arrow) -> Reaction type:

Products:
Aluminum Oxide
b) Al + O₂ -> Reaction type:

Answer 1

the first one is a decomposition reaction

the second one is also a synthesis reaction

Answer 2

Solution:-1

`\boxed{\sf {MgCO_3\atop Magnesium\:Carbonate}\overset{\Delta H}{\longrightarrow}{MgO\atop Magnesium \:Oxide}+{CO_2\atop Carbon\:Dioxide}}`

It is a thermal decomposition reaction

Solution:-2:-

`\boxed{\sf {4Al\atop Aluminium}+{3O_2\atop Oxygen}\longrightarrow{2Al_2O_3\atop Aluminium\:oxide}}`

It is a combination reaction.