Thinking about the position of the signal due to hydrogen in the NMR spectra of the following species, rank them in order of the frequency required to flip the spin of the H atom from lowest to highest: a. H-H
b. H-F
c. H-Br
d. H-Li
e. H-C

#7 how does the structure of amino acids allow them to form a polypeptide? each amino acid has an amino group and a carboxyl group. each amino acid has a hydrogen atom and a carboxyl group. each amino acid has a carboxyl group and an r group. each amino acid has an r group and a hydrogen atom.