Do carbon monoxide and nitrogen dioxide produce homogenous mixtures in air?
A. Carbon monoxide has a molecular weight of 28 grams per mol. Air has a molecular weight of approximately 29 grams per mol. Carbon monoxide will homogeneously mix in air. Nitrogen dioxide has a molecular weight of approximately 46 grams per mol. This gas will tend to settle. However, it should be noted that hot exhaust gas from a diesel engine will initially rise, quickly cool and drift down to layer when mixed with room air.
