6. The percentage composition of acetic acid is found to be 39.9% C, 6.7% H, and 53.4% O. Determine the empirical formula of acetic acid. (CH 2O) The molar mass was determined by experiment to be 60.0 g/mol. What is the molecular formula? (C 2H 4O 2) 7. Aniline, a starting material for urethane plastic foams, consists of C, H, and N. Combustion Worksheet: Percent Yield Name 1. Chlorobenzene, C6H5Cl, is used in the production of chemicals such as aspirin and dyes. One way that chlorobenzene is prepared is by reacting benzene, C6H6, with chlorine gas according to the following BALANCED equation. C6H6 (I) + (g) (s) + (g) a. What is the theoretical yield if 45.6 g of benzene react? (z, -Y b.