Principles of Modern Chemistry
8th Edition
ISBN: 9781305079113
Author: David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher: Cengage Learning
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You know that the wavenumbers of the rotational transition J = 1← 0 for 1H35Cl and2H35Cl are 20.8784 and 10.7840cm-1, respectively. Accurate atomic masses are1.007825 and 2.0140 for 1H and 2H, respectively. The mass of 35Cl is34.96885. Conclude based on this information that the bond lengths are the sameor different
The nuclear spin of deuterium, D, is I= 1. Calculatethe ratio of the number of ways of achieving rotational statesw ith odd and even values of J.
The wavenumber of the fundamental vibrational transition of Cl 2 is 565 em·'. Calculate the force constant of thebond.
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- The pure rotational spectrum of1H131I consists of a series of linesseparated bu 13.10 cm−1. Calculate (a) the moment of interia, and (b) the internuclear distance.arrow_forwardIs the transition A1g → E2u forbidden for electric dipole transitions in a D6h molecule?arrow_forward(hydrogen iodide, the superscripts represent the atomic mass number) (a) How fast will HI molecules rotate at the quantized rotational state with the rotational quantun number J of 2, given the bond length of 0.161 nim? (b) Calculate the effective force constant of the vibrational mode of HI at a wavenumber of 2300 cm' measured by infrared absorption spectrum. (c) HI has the bond energy of 3.06 eV. Applying the parabolic approximation to estimate the longest distance in which H and I atoms can be stretched before the dissociation of the molecular bondarrow_forward
- The rotational constant of NH3 is 298 GHz. Calculate the separation of the pure rotational spectrum lines as a frequency (in GHz) and a wavenumber (in cm−1), and show that the value of B is consistent with an N–H bond length of 101.4 pm and a bond angle of 106.78°.arrow_forwardYou will perform rotational spectroscopy on the diatomic molecule 25A29B (where A and B are generic elements with an interatomic spacing that is expected to be 1.28 Å). Prior to the experiment, you want to predict what the spectrum will look like so you know what to expect and one spectral line you are particularly interested in is the transition between l =2 and the next higher state. What is the wavenumber (in cm-1) of the photon for this transition? Write your answer to two decimal places (X.XX). Answer: 5.88arrow_forwardInfrared absorption by 1H81Br gives rise to a P branch from v = 0. What is the wavenumber of the line originating from the rotational state with J = 2? Hint: Use data from Table 11C.1.arrow_forward
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