Answer:
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.
