Question

An organic substance containing Carbon, Hydrogen, oxygen have the percentage composition as C=40.687%,h=5.085% and o=54.228% The vapour density of the compound is 59 Calculate the Molecular Formula of the Compound​

Answer 1

Answer:

Basic →100 g of compound

  masses M.M  moles  Ratios  Ratio  

C 403687  12  3.3916  3.4/3.4=1  2  

H 5.085  1  5.085  5.1/3.4=1.5  3  

O 54.228  16  3.392  3.4/3.4=1  2  

Emperical formula =c2 h2 o2

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Emperical mass =2×12+3×1+2×16

=24+3+32

=59

molecular mass =2×vapor density

=2×59=118

n=  E.M/M.M=59/118=2

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molecular formula =nX E.F=2×c2 h3 o2

=c4 h6 04.

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