Question

The percentage composition by weight of a compound is given below. Find its
empirical and molecular formula.
C=92.308
H=7.692
Mol. Weight=78​

Answer 1

Answer:

Carbon = 92.4 grams

Hydrogen = 7.6 grams

moles of Carbon =

12

12.4

=7.7 moles

Moles of Hydrogen =

1

7.6

=7.6 moles

Ratio =

7.6

7.7

=1 (approx)

Empirical formula = CH

Molar mass = 78

n=78/CH(13)=6

molecular formula = C

6

H

6