Course Home C Secure htt ta MasteringOemistry: Chaptr x @ 622: The phaselectrie

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Course Home C Secure htt ta MasteringOemistry: Chaptr x @ 622: The phaselectrie ener × D owwe K Chapter & Electronic Structure of Atoms Problem 6.29 3 of 10 fhan required for this pert If you need this submitting your answer esult for any later cakoulation in this inem, keep al the digits and round as he ial s any Constants 1 PerdTa One type of sunbun occurs on exposune to UV ight of wavelength in the vicinity of 330 nm ?PartC N6.93 10 X Incorrect; Try Again; 3 anemgts remaining - Part D of radiation demage the 330 m rediation o break an average chemical bond in the skin, ewamate the vage eneray of these bonds in k/ J/mol average bond eseegy Submit

Explanation / Answer

E = hv ....... h is Planck's constant, v is the Greek letter "nu" and represents the frequency. Knowing that c = ?v, we can write....
E = hc / ?
E = 6.63x10^-34 Js x 3.00x10^8 m/s / (330x10^-9 m)
E = 6.03x10^-19 J per photon

One mole of photons gives 363 kJ, or 363 kJ/mol.

(c)  

1.15 mJ = 1.15x10^-3 J

# photons
= 1.15x10^-3 J / 6.03x10^-19 J
= 1.907×10^15

(d) Energy of 1 mol of chemical bonds = Energy of 1 mol of photons
= 363 kJ

Thank You

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