Page 1 of 1

Homework question 1.27

Posted: Fri Apr 27, 2018 9:14 am
by Jonathan Marcial Dis 1K
How would we calculate moles of photons in homework problem 1.27?

Re: Homework question 1.27

Posted: Fri Apr 27, 2018 11:05 am
by Beverly Shih 1K
Once you have the number of electrons emitted in 2 seconds, you can just divide that by Avogadro's constant to get the moles of electrons emitted in 2 seconds.

Re: Homework question 1.27  [ENDORSED]

Posted: Sun Apr 29, 2018 4:11 pm
by Megan Potter 1G
And to find the number of photons, use the equation E=hc/wavelength. then take the total Energy (64J) and divide that by the Energy you just found (which is J/photon --> 473x10^-19) to get the number of photons which is 1.35x10^20 photons.

Re: Homework question 1.27

Posted: Sun Apr 29, 2018 5:16 pm
by ElizabethP1L
Just divide the number you found that's emitted in two seconds by Avogadro's number (6.02*10^23) since there are that many atoms in just a single mole. Hope this helped! :)