How many structural isomers can you draw for pentane?

How many structural isomers are possible for butane?

How many structural isomeric alkenes on hydrogenation give -n -Pentane.

How many structural isomers can be represented by alkene, C_5H_(10) ?

How many isomers can be drawn for pentane with molecular formula C_5 H_12 ? What are they? Draw their structures and mention their common names.

How many structural isomers can be possible for yellow complex?

How many structural isomers are possible for the molecular formula C_(4)H_(8) which can undergo ozonolysis?