CHEM 120 Exam 4 Questions With Complete Solutions

Hydrocarbons correct answer: contain only carbon and hydrogen Alkanes correct answer: single bonds, saturated, sp3 hybrid, tetrahedral, 109.5 deg, sigma bonds only, free rotation about C Alkenes correct answer: double bonds, unsaturated, sp2 hybrid, trigonal planar, flat, rigid about C, pi bond, polyunsaturated:many double bonds Alkynes correct answer: triple bonds, unsaturated, sp hybrid, linear Aromatic correct answer: benzene ring, unsaturated Structural Formula correct answer: H-C-C-C-H Condensed Structural correct answer: CH3CH2CH3 Carbon Skeleton correct answer: zig-zag lines that represent a carbon at each peak and endpoint Structural Isomers correct answer: have the same molecular formulas, but the atoms are bonded in a different order Geometric Isomers correct answer: they cannot change/move their double bond, so they change the orientation of their substituents rather than C Cis correct answer: same side Trans correct answer: opposite side Alcohols correct answer: -OH Ethers correct answer: -O-