Question

How many electrons are there in 3.5 x 10" C?

Answer 1

`2.19\cdot 10^(20)` electrons

Step-by-step explanation:

I assume you mean:

How many electrons are there in
`3.5\cdot 10^(1)C`?

Solution:

The charge of one electron is (in magnitude)

`e=1.6\cdot 10^(-19)C`

The charge in this problem is

`Q=3.5\cdot 10^(1) C`

So, we can find how many electrons are in this charge by simply dividing the total charge by the charge of one electron:

`n=(Q)/(e)=(3.5\cdot 10^(1))/(1.6\cdot 10^(-19))=2.19\cdot 10^(20)`