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Alkenes contain a pi bond, which is a site of high electron density, since it contains a pair of electrons delocalised around the two bonded carbon atoms. Because of this, the pi bond can act as a nucleop...
Compared to water ice is less dense this is due to hydrogen bonds in the open lattice holding the H2O molecules apart whereas in liquid form the hydrogen bonds break allowing the molecules of w...
Different substances (fractions) can be separated as they have slightly different boiling points. Different hydrocarbons condense at different sections of the fractionating column, which is very hot at th...
The crude oil, which is composed of a mixture of different hydrocarbons, is heated in the bottom of the tower, so that hydrocarbons with lower boiling points boil off first. The tower gets gradually colde...
Using the acid dissociation equation, Ka = [H+][A-]/[HA]. (where Substitute the known values into the concentration to give 1.78x10-5= [H+][A-]/0.4 . Because the acid is dissociating in solutio...
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