Question

what is the simplest formula of the compound which has following percentage carbon 80℅,hydrogen 20℅,if the molecular mass is 30 .calculate its molecular formula?

Answer 1

Answer:

C2H6

Explanation:

80/12=6.66 : C

20/1= 20 : H

6.66/6.66 = 1 : C

20/6.66 = 3 : H

Empirical formula = CH3 : 15

r = molecular mass / empirical formula mass

r = 30/15: 2

Molecular mass : C2H6