Question

Stuck, please help!

A piece of metal has a charge of +2,5 nC. How many electrones would you have to add to neutralise the charge?

I figured since one electron has a charge of 1,602*10^-19 C, the answer should be

(1,602*10^-19) / (2,5*10^-9) = 6,4*10^-11

However, the correct answer is 1,6*10^10

Answer 1

u have mistaken there.
u have to do reverse.
just like this: -

\[\frac{2.5 \times 10^{-9}}{1.602 \times 10^{-19}}.\]

Answer 2

= \[1.6 \times 10^{10}.\]

Answer 3

Did u gt @math0101 ?

Answer 4

Ah, I see. That *should* be obvious. Thanks. :)

Answer 5

:)