15. What is the molecular formula of a compound that has a molar mass of 54g and the empirical formula C_(2)H_(3) C_(4)H_(6) C_(2)H_(3) C_(6)H_(9) C_(8)H_(12)

To determine the molecular formula of a compound from its empirical formula and molar mass, follow these steps:1. **Calculate the molar mass of the empirical formula**: The empirical formula given is . - Carbon (C) has an atomic mass of approximately 12 g/mol. - Hydrogen (H) has an atomic mass of approximately 1 g/mol. Therefore, the molar mass of is: 2. **Determine the ratio of the molar mass of the compound to the molar mass of the empirical formula**: The molar mass of the compound is given as 54 g/mol. 3. **Multiply the subscripts in the empirical formula by this ratio to find the molecular formula**: Since the ratio is 2, multiply each subscript in by 2: Therefore, the molecular formula of the compound is .