posted by Gift .
Write down (a) condensed and (b) skeletal structural formulas for isomers of an organic substance whose chemical formula has 5 carbon atoms and 12 hydrogen atoms and (c) provide the common name for each of the isomers
so there are no double bonds or equivalents
(CH3)2CHCH2CH3 (2 methyl butane)
CH3(CH3)2CCH3 (2,2 dimethyl propane)