29_InstSolManual_PDF_Part4

# 29_InstSolManual_PDF_Part4 - where a is the spacing between...

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29.19. Set Up: The energy of the photon is related to its wavelength by Visible light has wavelengths between 400 nm and 700 nm. Solve: The photon must have energy 4.48 eV. This wavelength is shorter than the wavelengths of visible light so lies in the ultraviolet. 29.20. Set Up: Solve: (a) This radiation is in the infrared. (b) This radiation is in the ultraviolet. (c) This radiation is in the microwave. 29.21. Set Up: Atomic energy levels are separated by a few eV. Vibrational levels are separated by a few tenths of an eV. Rotational levels are separated by a few thousandths of an eV or less. Solve: (a) This is a typical transition energy for a rotational transition. (b) This is a typical transition energy for a tran- sition between atomic energy levels. Reflect: As the transition energy increases, the photon wavelength decreases. 29.22. Set Up: The density is the mass per unit volume. Assume each atom occupies a volume of where Solve: There are equal numbers of Na and Cl atoms and the average mass is 29.23. Set Up: The density is the mass per unit volume. Assume each atom occupies a volume of
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Unformatted text preview: where a is the spacing between adjacent atoms. Solve: There are equal numbers of K and Br atoms and the average mass is and a 5 1 m r 2 1 / 3 5 1 9.90 3 10 2 26 kg 2.75 3 10 3 kg / m 3 2 1 / 3 5 3.30 3 10 2 10 m 5 0.330 nm. r 5 m a 3 1 2 1 6.49 3 10 2 26 kg 1 1.33 3 10 2 25 kg 2 5 9.90 3 10 2 26 kg. a 3 , r r 5 m V 5 4.855 3 10 2 26 kg 1 0.282 3 10 2 9 m 2 3 5 2.16 3 10 3 kg / m 3 . 1 2 1 3.82 3 10 2 26 kg 1 5.89 3 10 2 26 kg 2 5 4.855 3 10 2 26 kg. a 5 0.282 nm. a 3 , r D E 5 hc l 5 1 4.136 3 10 2 15 eV # s 21 3.00 3 10 8 m / s 2 207 3 10 2 9 m 5 5.99 eV. D E 5 hc l 5 1 4.136 3 10 2 15 eV # s 21 3.00 3 10 8 m / s 2 3.10 3 10 2 3 m 5 4.00 3 10 2 4 eV. D E 5 hc l . l 5 hc D E 5 1 4.136 3 10 2 15 eV # s 21 3.00 3 10 8 m / s 2 3.20 3 10 2 3 eV 5 388 m m. l 5 hc D E 5 1 4.136 3 10 2 15 eV # s 21 3.00 3 10 8 m / s 2 8.50 eV 5 146 nm. l 5 hc D E 5 1 4.136 3 10 2 15 eV # s 21 3.00 3 10 8 m / s 2 0.250 eV 5 4.96 m m. D E 5 hc l l 5 hc E 5 1.24 3 10 2 6 eV # m 4.48 eV 5 277 nm E 5 hc l 5 1.24 3 10 2 6 eV # m l . 29-4 Chapter 29...
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