Chemistry

Alkenes- CnH2n

Alkenes have a double carbon bond and are used for making plastics

*Double bond can open up allowing two carbon bonds to react wth other atoms.

Alkanes-Have a single carbon bond and are used for making petrol. 

Large hydrocarbon molecules can be broken down by a catalyst. This is knows as catalystic cracking. 

-Catalyst something that starts off a reaction. 

Polymers are made from large molecules…