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## Homework Statement

The potential energy of two atoms separated by a distance

*r*may be written as:

U(

*r*) = 4U

_{atomic}* [(

*r*

_{0}/

*r*)

^{12}- (

*r*

_{0}/

*r*)

^{6}]

>Given

*r*

_{0}= 4.0 A

_{o}and U

_{atomic}= -0.012795 eV, what is the distance at which there is no net force between the atoms? Express your answer in terms of A

_{o}.

>What is the potential energy at the position where the net force is 0 N? Express your answer in terms of eV.

## Homework Equations

The above equation.

## The Attempt at a Solution

I tried using Coulomb's Law, but I don't know the charges so it's not very helpful. Finding the total energy is also not relevant since I don't know mass or velocity. I'm pretty stuck here. I know once I find the first part I can find the second part easily, but I feel like I'm overlooking something simple for the first part of the question.