Which statement best distinguishes carbon dioxide from carbon monoxide? a. one is a solid and one is a gas at room temperature. b. one has more oxygen atoms than the other. c. one has more carbon atoms than the other. d. there is no difference because the compound goes by two names.

"One has more oxygen atoms than the other" best distinguishes carbon dioxide from carbon monoxide

Explanation:

In both carbon monoxide and carbon dioxide, there is the presence of carbon and oxygen. However,they vary depending on the number of oxygen atoms.In carbon monoxide, there is the presence of one only  carbon and oxygen atom. Thus carbon monoxide is chemically represented as CO. Only about 0.2%ppm of carbon monoxide present in air.  carbon monoxide is toxic and causes death in human when not consumed is correct proportion.

Whereas in carbon dioxide, only one carbon atom,and two oxygen atom and hence chemically represented as co2.