Supplementary-Materials-Exam-3-2010

Supplementary-Materials-Exam-3-2010 - Chemistry 300L...

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Chemistry 300L Analytical Chemistry EXAMINATION SUPPLEMENTARY MATERIALS for Exam 3 Some Constants of Interest F = 9.649 × 10 4 coulombs/mol R = gas constant = 8.314 J/K·mol or volt·coulombs/K·mol = N A k B Plank’s Constant is 6.626 x 10 34 J s Speed of light is 2.997 x 10 8 m s 1 Avogadro’s Number, N A , is 6.022 x 10 23 mol 1 Boltzmann’s constant, k B , is 1.381 x 10 23 J K 1
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Chemistry 300L Supplementary Materials for Exam 3 page 2 Chapter 18 20 Equations Properties of Light νλ = c in vacuum = c/n in a medium with refractive index n E = h ν where is frequency in Hertz (cycles per second) s 1 hc E hcv λ == where = 1/ almost always wavenumbers, 1/centimeters, cm 1 Transmittance: T = P/P 0 where P = irradiance (intensity) A = log = log P o P 1 T = log T = ε b c Absorbance: Fourier Transform Spectroscopy Spectral width ( SW ) ~ maximum frequency measurable in spectrum (cm 1 for IR, s 1 (Hz) for NMR ): 1 2 SI 2 () i i = ss r SI 1 2 SR SW = or SW = , where SR = , 2 points/Hz are necessary to characterize a given frequency, SI
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Supplementary-Materials-Exam-3-2010 - Chemistry 300L...

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