1. The energy needed to dissociate an oxygen molecule into oxygen atoms (the bon

Question

1. The energy needed to dissociate an oxygen molecule into oxygen atoms (the bond energy) is 498 k,J / mol. What is the maximum wavelength of light that will initiate the split of oxygen molecule? Is visible light capable to complete this process?<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

2.In the potassium emission spectrum quite intense line is observed at 766.0 nm. Calculate the frequency of radiation producing this line. Is this line visible to the eye? If your previous answer is yes, what is the color of this line? If not, is it at higher or lower energy than visible light? (c = 2.998 x 108m/s; R = 3.2881 x 10151/s)

3. Find the energy change when an electron moves from the n = 4 level to the

n = 2 level in the hydrogen atom. If this energy is emitted as a photon, what is the wavelength of this photon? (c = 2.998 x 108m/s; R = 3.2881 x 10151/s)

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Explanation / Answer

Alternatively E=13.6eV(1/n1^2-1/n2^2) = 2.55 eV

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