Step 1: Calculate Moles for each Element:
Mole of C = 60.0 / 12 = 5
Mole of H = 5.05 / 1.008 = 5.009
Step 2: Calculate Mole Ratio:
Divide each mole value with least mole value.
H : C
5.009/5 : 5/5
1 : 1
So,
Empirical Formula = C₁H₁ or CnHn ------ (1)
Step 3: Calculate Molecular Formula:
By using formula,
n = Molecular Mass / Empirical Formula Mass
Molecular Mass = 78.12 g/mol
Empirical Formula Mass = 12 + 1 = 13 ∴ C = 12 & H = 1
So,
n = 78.12 / 13
n = 6
Putting value of n in eq. 1,
C₆H₆
Result:
The correct answer is C₆H₆.
