Which substance is the oxidizing agent in this reaction? feo+co→fe+co2 express your answer as a chemical formula?

In the equation given above, the oxidizing agent is FeO.
An oxidizing agent in a chemical reaction is defined as that substance, which has the capacity to oxidize other substances by gaining electrons from them. In a chemical reaction, an oxidizing agent is usually reduced by gaining electrons.
In the chemical equation given above, iron ll oxide oxidizes carbon monoxide to carbon dioxide. 

Deposition is the transition of matter going from gas to solid without passing through the liquid phase.a.) gas—-> solid