A hydrocarbon has a density of 0.9 g/mL and a molecular weight of 220 g/mol. What is its empirical formula?
Q1. A hydrocarbon has a density of 0.9 g/mL and a molecular weight of 220 g/mol. What is its empirical formula?
Answer: C15H12
Explanation: For empirical formula CxHy, density = (12x + 1y) / (12x + y). Given density of 0.9, 0.9 = (12x + 1y) / (12x + y). By trial and error, option B has the correct empirical formula.