What is the energy of 1.2 mol of violet photons?

Violet light has a wavelength of about 410. nm


Its frequency is 7.32e14 s^-1.


The energy of one photon of violet light is 4.85e-19 J.





What is the energy of 1.2 mol of violet photons? ___kJ

What is the energy of 1.2 mol of violet photons?
1.2mol = 1.2mol x 6.022e23photons/mol ≈ 7.226e23photons


you're given


4.85e-19 J/photon


so


Energy


= 7.226e23photons x 4.85e-19 J/photon


≈ 350 kJ





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