Answer:
The molecular formula of benzene =
Explanation:
% of C = 92.3
Molar mass of C = 12.0107 g/mol
% moles of C = = 7.6848
% of H = 7.7
Molar mass of H = 1.00784 g/mol
% moles of H = = 7.6401
Taking the simplest ratio for C and H as:
7.6848 : 7.6401
= 1 : 1
The empirical formula is =
Molecular formulas is the actual number of atoms of each element in the compound while empirical formulas is the simplest or reduced ratio of the elements in the compound.
Thus,
Molecular mass = n × Empirical mass
Where, n is any positive number from 1, 2, 3...
Mass from the Empirical formula = 12+ 1 = 13 g/mol
Molar mass = 78.0 g/mol
So,
Molecular mass = n × Empirical mass
78.0 = n × 13
⇒ n ≅ 6
<u>The molecular formula of benzene = </u>