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**help -- webassign due tonight -- need some help**

## Homework Statement

A parallel-plate capacitor has a plate area of 160 cm2 and a plate separation of 0.0400 mm.

A). Determine the capacitance.

which i got to be 3.54e-9 F

B). Determing the potential difference when the charge on the capacitor is 450.0 pC.

______V

## Homework Equations

C= ɛo A/d

## The Attempt at a Solution

i got part a using that equation, and i know that i should use it for part B, but i'm confused as to how to incorporate the 450pC....