Question

The molecular mass of an organic compound is 78. Its empirical formula is CH. The molecular formula is _______.
(A) C₂H₄
(B) C₂H₂
(C) C₆H₆
(D) C₄H₄

Answer 1

a/ c2h4=24+4=28 the molecular mass

Answer 2

Explanation:

molecular mass of CH is

n = molecular mass

empirical formula mass

= 78/13 = 6

Molecular Formula = Empirical formula × 6

CH × 6 = C6H6