Electrostatics - Compute the electric charge

[noobie!]

Homework Statement

three point charges q1,q2&q3 are place at the vertices of triangle as shown in the diagram charge q1 has been given 4.5 X 10^13 extra electrons, charge q2 given 9.0 X10^13 extra electrons and q3 has had 9.0 X 10^13 electrons taken from it. Calculate the electric charge of q1,q2,&q3?

Homework Equations

no,sorry..

3. The Attempt at a Solution [
1stly i use the formula V=u/q to find the charge but it doesn't work,so I'm stuck with it!

 

[Doc Al]

What's the charge per electron? (Look it up.)

 

[noobie!]

What's the charge per electron? (Look it up.)

ohh..ya,i wasn't realize about it..thanks for the hint,mentor..thanks a lot..=>