Which represents an empirical formula?

A. C2H4

B. B2H6

C. Al2O3

D. C6H6

C. Al2O3

Explanation:

The empirical formula is an expression that represents the simplest proportion in which the atoms that form a chemical compound are present. It is therefore the simplest representation of a compound.

For options A, B and D the empirical formulas are as follows:

A. CH2

B. BH3

D. CH