What are the two properties of carbon which lead to the huge number of carbon we see around us?

Draw the structures for the following.

(i) Ethanoic acid

(ii) Bromopentane*

(iii) Butanone

(iv) Hexanal

*Are structural isomers possible for Bromopentane?

How many structural isomers can you draw for pentane?

What will be the formula and electron dot structure of cyclopentane?