1.

Write the molecular formula of an alkene and alkane with twenty carbon atoms.

Answer»

The general molecular formula of an alkane is written as CnH2n+2, and the general formula of an alkene is written as CnH2n where ‘n’ is the number of carbon atoms. 

Now for n=20, the molecular formula of 

a) Alkane will be C20H2x20+2 or C20H42 

b) Alkene will be C20H2x20 or C20H40



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