Question

The empirical formula of a compound is CH. It's moleculer weight is 78 the molecular formula of the compound will be

Answer 1

Answer:

C6H6

Explanation:

SINCE THE EMPIRICAL FORMULA OF THE HYDROCABON IS CH, THEN ITS GOING TO BE;

                    (CH)n=78

                    RELATIVE ATOMIC MASS OF CARBON IS 12 AND HYDROGEN IS 1 THEREFORE

                         (12 + 1 )n = 78

                         (13)n=78

                         n=78/13

                          n=6

therefore your molecular formula is C6H6

Answer 2

C6H6

Given:

Empirical Formula of a compound = CH

Calculating the Weight of the Empirical Formula:

= 12 x 1 + 1 x 1

= 12 + 1

= 13

Molecular Weight which is given to us = 78

To Find:

Molecular Formula of the compound

Formula used to solve this type of question:

= Molecular Weight / Weight of Empirical Formula

Substituting the values known to us into this formula we get:

= 78 / 13

= 6

Molecular Formula that is given

= (CH)n

Substituting the value of n as 6 we get:

= (CH)6

= C6H6

Therefore, the molecular formula of the compound will be C6H6.