Final answer:
The empirical formula of copper chloride is CuCl2, reflecting a ratio of one copper atom to two chlorine atoms.
Step-by-step explanation:
To determine the empirical formula of copper chloride, we look at the ratios of the elements involved. Given the data, we have two different compounds where copper reacts with chlorine. Compound A has a ratio of 4.08 g of copper to 2.28 g of chlorine, and Compound B has 7.53 g of copper to 8.40 g of chlorine. However, when we look at the fundamental ratios, we identify that copper can form a compound with chlorine in a 1:2 ratio, which suggests that the empirical formula of copper chloride is CuCl2. This is the lower whole number ratio of copper to chlorine atoms. Here, Cu represents copper, and Cl represents chlorine. The numeral '2' after Cl indicates that there are two chlorine atoms for every one copper atom.