Question

What is the simplest formula of the compound which has
the following percentage composition: Carbon 80% , Hydrogen
20%. Calculate its molecular formula.​

Answer 1

Answer:

C2H6

Explanation:

elements , percentage, atomic number, no.of mole

C. 80. 12. 80/12=6.6

H. 20. 1. 20/1= 20

therefore,

Empirical formula is CH3.

calculation of molecular formula,

Emperical formula= 12×1+1×3=15

n= molecular mass/emperical formula

=30/15

=2.

Molecular formula=2× Empirical formula

=CH3×2

=C2H6.