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Mila Waters

Mila W.

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(a) Ozone formation in the upper atmosphere starts when oxygen molecules absorb UV radiation with wavelengths less than or equal to $242 \mathrm{nm}$. Find the frequency and energy of the least energetic of these photons. (b) Ozone absorbs radiation with wavelengths in the range $2200-2900$ A thus protecting organisms from this radiation. Find the frequency and energy of the most energetic of these photons.

(a) Ozone formation in the upper atmosphere starts when oxygen molecules absorb UV radiation with wavelengths less than or equal to $242 \mathrm{nm}$. Find the frequency and energy of the least energetic of these photons. (b) Ozone absorbs radiation with wavelengths in the range $2200-2900$ A thus protecting organisms from this radiation. Find the frequency and energy of the most energetic of these photons.

CHEMISTRY: The Molecular Nature of Matter and Change

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David Collins verified

Numerade educator

Three photons strike a metal surface. Photon 3 has twice the energy of photon 2, which has twice the energy of photon 1. Photon 1 has just enough energy to eject an electron from the metal with no kinetic energy. How much faster is the electron ejected by photon 3 moving as compared to photon 2? 4 times 1.73 times 1.41 times 2 times they are moving at the same speed

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Jennifer Hudspeth verified

Numerade educator

The following four spheres represent Be, Be2+, O and O2- (not necessarily in that order). A, r = 112 pm B, r = 27 pm C, r = 140 pm D, r = 64 pm Which pair of reactions is most consistent with the relative sizes of these species? A ? C + 2e- and D + 2e- ? B A + 2e- ? B and C ? D + 2e- A ? D + 2e- and C + 2e- ? B A ? B + 2e- and D + 2e- ? C A + 2e- ? C and D ? B + 2e-

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Angela Williamson verified

Numerade educator

19.51 mL of NaOH is used to titrate 10.00 mL of 0.150 M HCl. What is the concentration of the NaOH solution, in mol/L?

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