Question

how is the molecular formula of a compound related to its empirical formula ?

Answer 1

Molecular Formula = n ( Empirical Formula)

Where n is a simple whole number and may have values 1,2,3... It is equal to

n = Molecular mass / Empirical formula mass

For example, Molecular mass of benzene is 78. The empirical formula of benzene is CH and its empirical formula mass is 13.

Thus, n = 78/13 =6

Therefore, molecular formula of benzene = 6(CH) = C6H6