Question

The empirical formula of a compound is determined to be C2H3, and its molecular mass is found to be 54.10 g/mol. Determine the molecular formula of the compound, showing your work.

Answer 1

C2=24.0g/mol
H3=3.0g/mol

24.0+3.0=27.0g/mol

54.10g/mol/24.0g/mol= aproximately 2

so just multiply the empirical formula by 2 giving you:
C4H6

The molecular formula is C4H6