A compound has the empirical formula CH and a molar mass of 78.11 g/mol . Find its molecular formula.

Molecular Formula = C6H6

Explanation:

Empirical Formular = CH

Molar Mass = 78.11

Molecular Formular = ?

The Formular relating these parameters is given as;

(Empirical Formula)n = Molecular Formular

where n = Number of moles

CH = 12.0107 + 1.00784 = 13.01854

(13.01854)n = 78.11

n = 78.11 / 13.01854

n = 5.9999 ≈ 6

Molecular Formula = C6H6

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.