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Home Q & A Board Science-Related Homework Help Physics
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irina irina
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Posts: 919
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11 years ago
A photon of ultraviolet (UV) light possesses enough energy to mutate a strand of human DNA. What is the energy of a single UV photon having a wavelength of 39 nm?
5.1e-18 J

that was the first question...but then it asks:
What is the energy of a mole of UV photons having a wavelength of 39 nm?
-the answer is in Joules


please explain it!
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3 Replies

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wrote...
#1
11 years ago
If you know the energy of one photon, multiplying by Avogadro's Number will give you the energy of a mole of photons of the same kind.

You may not be used to the idea of a mole of photons, but you can have a mole of anything.  By the way, a mole of photons is called an Einstein.
irina Author
wrote...
#2
10 years ago
Thx!
wrote...
#3
5 months ago
https://biology-forums.com/index.php?action=downloads;sa=view;down=15996
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