What Is the Potential Difference When Moving a Coulomb Between Plates?

[hightoxic56]

Homework Statement

Well honestly I am not that great in physics. I thought someone can help me with this question about potential difference.

If a 120J of work are performed to move one coulomb from a positive plate to a negative plate, what potential difference exists between the plates?
P.S- I don't know how to start it, so if someone would be kind enough to help me. Thanks :)

Homework Equations

The Attempt at a Solution

 

[tramar]

It would help to know for this problem that 1 Volt is equal to 1 Joule/Coulomb. Play with the units and see what you can come up with.