A volatile molecular fuel, \(\text{X(g)}\), consists only of \(\text{C}\), \(\text{H}\), and \(\text{O}\). A student ignites the fuel in excess \(\text{O}_2\text{(g)}\) in a rigid container. The temperature is maintained high enough that the water produced remains gaseous. The particulate representations show the container before ignition and after the reaction has gone to completion. All of the fuel reacts, and only the species shown are present after the reaction.

Which of the following is the empirical formula of \(\text{X}\)?