Answer to Question #165863 in Chemistry for Ava Brooke

Question

What is the molecular formula if the empirical formula is CH₂ and the original formula mass is 210.39?

Answer 1

The empirical formula can be calculated as following:

(molar mass of empirical form) x = molar mass of compound

(Mr[C] + 2 × Mr[H]) x = Mr[compound]

(12 g/mol + 2 × 1 g/mol) x = 210.39 g/mol

14 x = 210.39

x = 15

From here, the empirical formula is (CH₂)₁₅ = C₁₅H₃₀

Answer: C₁₅H₃₀