Moles in photoelectric effect? [ENDORSED]

$c=\lambda v$

Ricky Ma DIS 4E
Posts: 72
Joined: Fri Sep 28, 2018 12:27 am

Moles in photoelectric effect?

Can someone explain to me why there are moles associated with Joules or the photoelectric effect in general? How are moles related to frequency etc? The mole questions really throw me off.

Olivia L 4E
Posts: 59
Joined: Fri Sep 28, 2018 12:23 am
Been upvoted: 1 time

Re: Moles in photoelectric effect?  [ENDORSED]

A mole isn't referring to a specific type of unit; instead, it is a numerical representation of whatever object, unit, etc. is at hand. There are 6.022 x 10^23 objects of whatever your measuring. This could be atoms, molecules, Joules, etc. It's just a measurement similar to how a "dozen" works.

904936893
Posts: 62
Joined: Fri Sep 28, 2018 12:29 am

Re: Moles in photoelectric effect?

If the threshold energy is given in Joules/mole, you just have to divide by Avogadro's number (6.022x10^23) in order to cancel the units. Then you will just have Joules and can use that number in your equations.