Question

a hydrocarbon contains 86 % carbon 448 �� of the hydrocarbon weighs1.68 � of stp. then the hydrocarbon is

Answer 1

Hydro carbon 86% C and 14% H

mole ratio 86/12: 14 = 7:14 = 1:2

Empirical formula = CH2 = 14 g

Gn 448 ml at stp weighs 1.68g

22400 ml at stp weighs 22400 x 1.68/448 = 84 g

Moleculat weight of the hydrocarbon is 84

n = 84/14 = 6

Therefore the compound is C6H12.

It can be a cyclo hexane or a hexene.

Answer 2

n=84/14=6

therefore,the compound is C6H12