Question

Acompound has the empirical formula CH.

The molar mass for the molecular formula is
78 g/mol. What is the molecular formula?

Answer 1

The empirical formula is the simplest whole number ration that defines constituent atoms in a species. The molecular formula is always a multiple of the empirical formula.

Molecule Formula = 78.0 • g • mol ^ -1 = n(12.011 + 1.00794) • g • mol ^ -1

78
N = ——————————- = 6
12.011 + 1.00794

Molecular Formula = C6H6