Question

1.4g of hydrocarbon on combustion gave ratio 1.8g water.the empirical formula is

Answer 1

If sub-atomic / molecular formula will be Cx Hy 1.8 g of water equivalents to 0.1 mole of water equivalents to 0.2 moles of Hydrogen atom. Presently , Hydrogen atom is originating from hydrocarbon so 'no. of moles of hydrocarbon × y=0.2'

=》(1.4/(12 × X + 1 × y )) × y = 0.2.

O n solving, we get

y/x = 2.

Thus, empirical formula is CH2.

Answer 2

Answer:

CH2

Explanation:

The formula to calculate the percentage of hydrogen present is 2/18×wt of h2o formed/wt of organic compound×100

by substituting these values qe get 14%

1. when we correlate the obtained hydrogen percentage with the given compounds we get CH2 as answer