1
Q
what is a hydrocarbon?
A
a compound that contains a carbon and hydrogen
2
Q
what do small molecules have?
A
low boiling points, light in colour, easy to light, runny
3
Q
what do large molecules have?
A
high boiling point, dark in colour, hard to light, thick
4
Q
how does crude oil form?
A
mixture of different substances formed over million of years from the remains of marine organisms.
5
Q
alkanes
A
saturated hydrocarbon molecules, all their bonds are c-c single bonds, burn very easily which makes them good for fuels.
6
Q
alkenes
A
unsaturated hydrocarbon molecules, at least one of their bond is a C=C double bond, don’t burn very easily but can be used to make polymers.
7
Q
alkanes formula
A
CnH2+2
8
Q
alkenes formula
A
CnH2n
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