Respuesta :
Explanation:
Molecular formula defined as the chemical formula which shows actual number of atoms of each element present in the compound.
Molecular formula = [tex]Empirical formula \times n[/tex]
where, n = 1, 2, 3,.....
On the other hand, empirical formula is the simplest chemical formula which shows the whole number of atoms of each element present in the compound.
Formula to calculate empirical mass of CH is as follows.
Empirical mass = 1 × atomic mass of C + 1 × atomic mass of H
= 1 × (12.01 amu) + 1 × (1.008 amu)
= 13.018 amu
Hence, value of n will be calculated as follows.
n = [tex]\frac{\text{molecular mass}}{\text{empirical mass}}[/tex]
= [tex]\frac{78.11 g/mol}{13.018 g}[/tex]
= 6
Thus, we can conclude that molecular formula of benzene is [tex]C_{6}H_{6}[/tex].
Answer:
The molecular formula of benzene is C₆H₆
Explanation:
Empirical formula of benzene: C₁H₁
Atomic mass of carbon (C) = 12.01 g/mol
Atomic mass of hydrogen (H) = 12.01 g/mol
Therefore, Empirical formula mass of C₁H₁ = 1 × Atomic mass of C + 1 × Atomic mass of H = 12.01 + 1.008 = 13.018 g/mol
The given molar mass of benzene = 78.11 g/mol
Since, Molar mass = n × (Empirical formula mass)
Therefore, n = (Molar mass) ÷ (Empirical formula mass)
n = (78.11 g/mol) ÷ (13.018 g/mol) ≅ 6
Since, Molecular formula = (Empirical formula)ₙ
Therefore, Molecular formula of benzene = (C₁H₁)₆ = C₆H₆
