The empirical formula of a chemical substance is ch. the molar mass of a molecule of the substance is 78.11 g/mol. what is the molecular formula of the chemical substance?

The chemical formula of the compound has been .

The empirical formula has been given as the whole number ratio of the elements in the compound. The chemical formula has been the representation of each atom constituted in the compound.

The empirical formula for the compound has been CH. The mass of empirical formula has been the sum of mass of C and H.

The mass of empirical formula has been:

The mass of empirical formula has been 13 g. The molar mass of compound has been 78.11 g/mol.

Number of empirical formula unit,  (n) has been given as:

The number of empirical formula unit has been 6. Thus, the chemical formula of the compound has been:

The chemical formula of the compound has been .

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C₆H₆  

Step-by-step explanation:

Data:

EF = CH

MF mass = 78.11 u

Calculations:

EF Mass = (12.01 + 1.008) u

EF Mass = 13.018 u

The molecular formula is an integral multiple of the empirical formula.

MF = (EF)ₙ

   n = MF Mass/EF Mass  

   n = 78.11 u/13.02 u  

   n = 6.000 ≈ 6

MF = (CH)₆

MF = C₆H₆

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