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Moles in photoelectric effect?

Posted: Sun Oct 14, 2018 12:56 am
by Ricky Ma DIS 4E
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.

Re: Moles in photoelectric effect?  [ENDORSED]

Posted: Sun Oct 14, 2018 1:14 am
by Olivia L 4E
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.

Re: Moles in photoelectric effect?

Posted: Sun Oct 14, 2018 9:11 am
by 904936893
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.