Answer :
The empirical formula of CH (m = 5, 78.11 g/mol) is C₆H₆.
How to find the molecular formula?
The whole number multiple is defined as follows.
Whole- number multiple = [tex]\frac{molar mass (g/mol)}{empirical formula mass (g/mol)}[/tex]
The empirical formula mass is shown below.
Mw of CH = Mw of C+ Mw of H
= 12.01 g/mol +1.01 g/mol
= 13.02 g/mol
The whole number multiple for the compound is
Whole - number multiple = [tex]\frac{78.11 g/mol}{13.02 g/mol}[/tex] ≈ 6
Multiplying the subscripts of C₁H₁ by 6, the molecular formula is
C(1×6)H(1×6) = C₆H₆.
An empirical formula does not mention the arrangement or number of atoms. It is typical for many macromolecules, including ionic compounds like calcium chloride and silicon dioxide (SiO2) (CaCl2).
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