The balanced equilibrium equation for the reaction between carbon monoxide (CO) and oxygen (O2) to create carbon dioxide (CO2) is:

2CO + O2 ⇌ 2CO2

Is this product favour or reactant

The product in this reaction is carbon dioxide (CO2). Since it appears on the right side of the equilibrium arrow, it is considered the product.

Therefore, carbon dioxide (CO2) is a product in the reaction between carbon monoxide (CO) and oxygen (O2).