Question

The strength of an electrostatic interaction can be estimated using a version of Coulomb's law: ?E = A k q1q2/D r, where A is Avogadro's number (6.02 × 10^{23}), k is 9.0 × 10^9 joules/coulomb², q1 and q2 are the charges on the groups measured in coulombs (1.6 × 10^{-19} coulombs per electron), D is the dielectric constant of the media, and r is the distance in meters. How strong is the coulombic attraction between a phosphoserine residue (charge 2–) and a histidine residue (charge 1+) on the other side of a protein 20 angstroms away? Assume the core of the protein is similar to hexane, with a dielectric constant of 4. 28.7 kJ/mol 34.6 kJ/mol 36.3 kJ/mol 27.1 kJ/mol 43.0 kJ/mol

          The strength of an electrostatic interaction can be estimated using a version of Coulomb's law: ?E = A k q1q2/D r, where A is Avogadro's number (6.02  × 10^{23}), k is 9.0 × 10^9 joules/coulomb², q1 and q2 are the charges on the groups measured in coulombs (1.6 × 10^{-19} coulombs per electron), D is the dielectric constant of the media, and r is the distance in meters. How strong is the coulombic attraction between a phosphoserine residue (charge 2–) and a histidine residue (charge 1+) on the other side of a protein 20 angstroms away? Assume the core of the protein is similar to hexane, with a dielectric constant of 4.

28.7 kJ/mol
34.6 kJ/mol
36.3 kJ/mol
27.1 kJ/mol
43.0 kJ/mol

Show more…

The strength of an electrostatic interaction can be estimated using a version of Coulomb's law: ?E = A k q1q2/D r, where A is Avogadro's number (6.02 × 10^23), k is 9.0 × 10^9 joules/coulomb², q1 and q2 are the charges on the groups measured in coulombs (1.6 × 10^-19 coulombs per electron), D is the dielectric constant of the media, and r is the distance in meters. How strong is the coulombic attraction between a phosphoserine residue (charge 2–) and a histidine residue (charge 1+) on the other side of a protein 20 angstroms away? Assume the core of the protein is similar to hexane, with a dielectric constant of 4.

28.7 kJ/mol
34.6 kJ/mol
36.3 kJ/mol
27.1 kJ/mol
43.0 kJ/mol

Added by Jessica P.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Snehal J

03/22/2022

Step 1

- Avogadro's number, \( A = 6.02 \times 10^{23} \) - Coulomb's constant, \( k = 9.0 \times 10^2 \, \text{J/C}^2 \) - Charge of phosphoserine residue, \( q_1 = -2 \times 1.6 \times 10^{-19} \, \text{C} \) - Charge of histidine residue, \( q_2 = +1 \times 1.6 \times Show more…

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