1. What is the energy of one mole of light that has a wavelength of 400 nm?

Chemistry
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1. What is the energy of one mole of light that has a wavelength of 400 nm?
(a)4.97 x 10-28 J
(b)4.97 x 10-19 J
(c)2.99 x 10-4 J
(d)2.99 x 105 J
Jan 9th, 2015

the energy of one photon is hf= hc/lambda = 6.63x10^-34 *3x10^8/(400x10^-9) =4.97x10-19 J

1 mole of photon =6.02 x10^23 *4.97x10^-19 = 2.99x10^5J

Jan 10th, 2015

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