The number of isomeric alkanes with molecular formula C6H12 are 13
(1) CH2=CH−CH2−CH2−CH2−CH3
(2) (cis and trans)CH3−CH=CH−CH2−CH2−CH3
(3) (cis and trans)CH3−CH2−CH=CH−CH2−CH3
(4) CH2=CH−C∣CH3H−CH2−CH3
(5) CH2=C∣CH3−CH2−CH2−CH3
(6) CH2=CH−CH2−C∣CH3−CH3
(7) (cis and trans)CH3−CH=CH−C∣CH3H−CH3
(8) CH3−C∣CH3=CH−CH2−CH3
(9) (cis and trans)CH3−CH=C∣CH3−CH2−CH3