I dont want to be picky or sound like a chemistry geek : but Carbon MONoxide is written CO not CO3 as it only has 1 Carbon & 1 Oxygen atom in the make up of the compound where as Carbon Dioxide is made up of 1 Carbon & 2 Oxygen atoms! CO3 would be Carbon Trioxide!

Hear endeth the Chemistry lesson .... now off to play with a Bunsen burner an a test tube!