Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
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Textbook Question
Chapter 18, Problem 18.3QAP
An antihistamine shows sharp peaks at Raman shifts of
(a) a helium-neon Laser (632.8 nm)?
(b) an argon-ion laser (488.0 nm)?
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- Why is 133C-133C spin-spin splitting not observed in ordinary organic compounds?arrow_forwardAssuming a harmonic potential, the fundamental transition for a diatomic molecule is 1603 cm-1. What is the energy, in wavenumber, of the v=3 level of the molecule?arrow_forwarda.) The spacings of the rotational fine structure lines of carbon dioxide 12C16O2 are determined from IR spectroscopy to be 0.7604 cm-1. Calculate the C=O bond length of the molecule (given masses: m(12C) = 12 amu, m(16O) = 15.9949 amu).Ans = ______ Angstroms b.) Suppose that the wavenumber of the J = 1 ← 0 rotational transition of 1H79Br considered as a rigid rotor was measured to be 17.89 cm-1, what is the bond length? Ans = ____ Angstroms When the moment of interia is 3.132x10^-47 kg*m^2(Given the isotopic masses:(m(79Br) = 78.9183 amu, m(81Br) = 80.9163 amu)arrow_forward
- Calculate the frequency of the J = 7 ← 6 transition in the pure rotational spectrum of 12C16O. Assume the equilibrium bond length is 109.36pm. Frequency is _____ H What is the corresponding wavenumber? ______ cm-1arrow_forwardThe vibrational transtion from v=0 to v=1 in CO occured at wavenumber= 2143.4 cm-1 calculate the force constant of COarrow_forwardWhat is the Doppler-shifted wavelength of a red (680 nm) traffic light approached at 60 km h−1?arrow_forward
- How do I go from frequency (eV) to wavenumber (cm-1)?arrow_forwardGiven that the maximum molar absorption coefficient of a molecule containing a carbonyl group is 30 dm3 mol−1 cm−1 near 280 nm, calculate the thickness of a sample that will result in (i) half the initial intensity of radiation, (ii) one tenth the initial intensity.arrow_forward
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