The compound contains 2.13% of hydrogen 12.76% of carbon and 85.11% of bromine. Its molar mass is 188g. What is the empirical and molecular formula?

Dear Student,

‚Äč
Element % At. mass Relative no. of atoms Simplest ratio
C   12.76 12 12.7612=1.06 1.061.06=1
Br 85.11 80 85.1180=1.06 1.061.06=1
H 2.13 1 2.131=2.13 2.131.06=2

The empirical formula is CH2Br
Empirical formula mass= 12+2×1+80=94n=Molecular massEmpirical formula mass=18894=2Molecular formula = (CH2Br)n= (CH2Br)2 = C2H4Br2

  • 0
What are you looking for?