Measurements show that unknown compound X has the following composition: element mass % chlorine 38.7% oxygen 61.2% Write the empirical chemical formula of X.

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.  

i think the answer is terrae but not 100 percent sure. ▓▬▬ §