How to chemically balance the equation CO+O2->CO2

The equation is already balanced.

Step-by-step explanation:

So you're trying to balance CO + O2 - > CO2. In this case, the chemical reaction is a combination, or an additive reaction.

To balance CO + O2 - > CO2, look at which elements have subscripts.

1. CO + O2

Carbon: 1

Oxygen: 2

1. - > CO2

Carbon: 1

Oxygen: 2

The chemical equation is already balanced since there are an equal number of subscripts for each element on each side.