Oxygen is the most abundant by weight
The vertical component of velocity is zero
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 , it means there are thrice number of hydrogen atoms as carbon atoms.
The molecular formula could be written as . Thus if number of carbon atoms are n, the number of hydrogen atoms are 2n.