Homework question 1.27  [ENDORSED]


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Jonathan Marcial Dis 1K
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Homework question 1.27

Postby Jonathan Marcial Dis 1K » Fri Apr 27, 2018 9:14 am

How would we calculate moles of photons in homework problem 1.27?

Beverly Shih 1K
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Re: Homework question 1.27

Postby Beverly Shih 1K » Fri Apr 27, 2018 11:05 am

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.

Megan Potter 1G
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Re: Homework question 1.27  [ENDORSED]

Postby Megan Potter 1G » Sun Apr 29, 2018 4:11 pm

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.

ElizabethP1L
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Re: Homework question 1.27

Postby ElizabethP1L » Sun Apr 29, 2018 5:16 pm

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! :)


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