Calculate the maximum tensile force that a polypeptide chain can withstand, assuming that the covalent bonds which hold the backbone together can be described by the Lennard-Jones potential function:
in which the values of and for carbon-carbon bonds are respectively and , while the corresponding values for carbon-nitrogen nitrogen bonds are respectively and .
Calculate the maximum tensile force that a polypeptide chain can withstand, assuming that the covalent bonds which hold the backbone together can be described by the Lennard-Jones potential function:
in which the values of and for carbon-carbon bonds are respectively and , while the corresponding values for carbon-nitrogen nitrogen bonds are respectively and .
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Related questions
Consider the molecule acetonitrile (CH3CN)
1. Which of the following must be overcome during the boiling of acetonitrile?
1. dispersion forces
2. dipole-dipole forces
3. hydrogen bonds
Which of the following must be overcome during the boiling of acetonitrile?
1. dispersion forces
2. dipole-dipole forces
3. hydrogen bonds
2 only | |
1 and 3 | |
1 and 2 | |
1 only | |
1, 2, and 3 |
2.
Shown above are the shorthand structures of phenylacetic acid and 1-octadecylamine. Recall that lines represent two-electron bonds. Ends of lines and junctures represent carbon atoms. Finally, hydrogen atoms bonded to carbon are omitted for clarity.
The solubility of phenylacetic acid in acetonitrile is 3.87 M and the solubility of 1-octadecylamine in acetonitrile is 0.08 M
Select the response that BEST rationalizes the relative solubilities
a. The dispersion forces in 1-octadecylamine are very favorable
b. Phenylacetic acid can form hydrogen bonds with the nitrogen in acetonitrile while 1-octadecylamine cannot form hydrogen bonds with the nitrogen in acetonitrile
c. There are no favorable dipole-dipole interactions between acetonitrile and 1-octadecylamine
d. The molecular weight of phenylacetic acid is closer to the molecular weight of acetonitrile