Reason:MW 100 ⇒ 14n+2=100 ⇒ n=7 ⇒ C₇H₁₆ (heptane).The 9 structural isomers of C₇H₁₆. Chiral ones:2-methylhexane3-methylhexane2,3-dimethylpentane2,4-dimethylpentane (has RR/SS enantiomers; RS is meso)All others are achiral.