7) Calculate the molecular formula for caffeine, a compound with a molar mass of 195.0 g and the following percent composition: 49.5% C, 5.15% H, 28.9 % N and 16.5% 0. 8) A compound used as a dry-cleaning fluid was analyzed and found to contain 18.0% C, 2.27% H and 79.73% Cl. Determine its empirical formula. If the molar mass of this compound was found to be 266.8 g/mol, what would be the molecular formula of this compound? certain hydrocarbon is burned in excess oxygen, producing 8.635 g