A COMPOUND OF  CARBON, HYDROGEN,& NITROGEN CONTAINS THESE ELEMENTS IN RATIO 9:1:3.5 CALCULATE EMPIRICAL FORMULA IF ITS MOLECULAR MASS IS 108, WHAT IS MOLECULAR FORMULA?

Element	Mass ratio	Atomic mass	Relative Number of atoms	Simplest ratio
C	9	12	9/12 = 0.75	0.75X4=3
H	1	1	1/1=1	1X4=4
N	3.5	3.5	3.5/14=0.25	0.25X4=1

 

Empirical ratio = C₃H₄N

Empirical formula mass = (3x12)+(4x1)+14= 54

n= Molecular mass               = 108 = 2

    Empirical formula mass         54 

Molecular formula = (empirical formula)₂  = (C₃H₄N)₂  = C₆H₈N₂