1. The chemical formula for any CFC, HCFC, or HFC can be obtained by adding 90 to its code number. The three numerals represent the number of C, H, and F atoms, respectively. The number of Cl atoms can then be determined using the condition that the number of H, F, and Cl atoms must add up to 2n + 2, where n is the number of carbon atoms. From this information, deduce the formulas for the following codes: a. 12 b. 113 c. 123 d. 124