Question 1342 Deck General

The correct answer is B) substance whose molecules contain other atoms as well as carbon and hydrogen. A chemical gas is a substance that exists in a gaseous state at normal temperature and pressure, and its molecules contain elements other than just carbon and hydrogen. Option B accurately describes this, as a chemical gas would have molecules that include atoms such as oxygen, nitrogen, chlorine, etc. in addition to carbon and hydrogen. Options A and D describe substances that only contain carbon and hydrogen, which would not accurately describe a chemical gas. Option C is incorrect because a chemical gas does have molecules, it's just that those molecules contain other elements besides just carbon and hydrogen.