3. Chemical Reactions

Which statement best explains why connecting paper clips is a common way to model a polymer in chemistry?

Most lipids contain long chains composed primarily of which two types of atoms?

Which of the following molecules contains an amino group?

Which of the following nitrogenous bases is found only in RNA and not in DNA?

Which of the following is the correct chemical formula for ethanol?

Which of the following IR absorption bands would you expect to observe in the functional group region (4000–1500 cm^{-1}) for ethanol (CH_3CH_2OH)?

Which of the following functional groups contains nitrogen?

Which of the following best describes the function of an emulsifier in chemistry?

Which of the following best describes the function of a carbonyl group in organic chemistry?