D. Each carbon atom is bonded to three hydrogen atoms. I immediately know that B is wrong, and while A and C are true, I don't think they are answers they are looking for.
Answer: A. It contains three times as many hydrogen atoms as carbon atoms.
Explanation: Empirical formula is the formula which shows the atoms of the elements in the simplest ratio of atoms whereas molecular formula show the actual number of atoms.
Thus if a compound has an empirical formula of [tex]CH_3[/tex], it means there are thrice number of hydrogen atoms as carbon atoms.
The molecular formula could be written as [tex][CH_3]_n[/tex]. Thus if number of carbon atoms are n, the number of hydrogen atoms are 2n.
