7 . The following molecules are considered to be:(A) enantiomers.
(B) diastereomers.
(C) meso compounds.
(D) structural isomers.8 . (+)-glyceraldehyde and (–)-glyceraldehyde refer to the (R) and (S) forms of 2,3-
dihydroxypropanal, respectively. These molecules are considered:(A) enantiomers.
(B) diastereomers.
(C) meso compounds.
(D) structural isomers.9 . Consider (E)-2-butene and (Z)-2-butene. This is a pair of what type(s) of isomers?I. Cis–trans isomers
II. Diastereomers
III. Enantiomers
(A) I only
(B) II only
(C) I and II only
(D) I and III only10 . 3-methylpentane and hexane are related in that they are: