A chemist is trying to find the identity of a compound. She knows that the compound has a molecular weight of , and also that it consists of carbon, hydrogen, and oxygen by mass. What are the empirical and molecular formulas, respectively, for this compound?

Which of the following is the alcohol functional group?

Which of the following functional groups is an amide?

What is the most acidic functional group on the amino acid cysteine? Cysteine has the chemical formula .

Which of the following is an organic compound?

Which one of the following organic functional groups does not contain a carbon-oxygen double bond?