homework prob ?

[1123581321]

i was wondering how you find how many electron have been removed if the resultant charge is +3.38 pC (3.38x10-12C).

 

given the charge of an electron being -1.60*10^-19 C

[DJBruce]

Look at the units. You have a charge in C, and you know the charge per electron so what would you do to have your answer come out in electrons?

[1123581321]

perhaps divide the electron charge into the systems charge...

[DJBruce]

perhaps divide the electron charge into the systems charge...

 

 

Yep, thats how you would do it! Since if do that you would have:

 

[math]\frac{Charge}{\frac{Charge}{Electron}}=Electrons[/math]

[1123581321]

thought so, cheers.

[mooeypoo]

!

Moderator Note

Moved to homework help.