Change in electrical potential energy of an ion as it moves out of cell. Please Help!?

A

Ally

New member
A Sodium (Na+) ion moves from the inside of a cell where the electrical potential is -70mV, to outside a cell, where the potential is 0V.

What is the change in the ions electrical potential energy as it moves from the inside to the outside of the cell?

I got -1.1x10^(-20) eV but it was marked wrong. Please help me find where I have gone awry. Thanks!
 
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