In the microwave spectrum of H35Cl the J=4 → J=5 rotational transition occurs
at a wavenumber of 106.0 cm–1.
(a) At what wavenumber does the J=5 → J=6 transition appear?
(b) Would the J=5 → J=6 transition of H37Cl appear at a higher or lower
wavenumber? Briefly justify your answer.


In the microwave spectrum of H35Cl the J=4 → J=5 rotational transition occurs at a wavenumber...
Calculate the frequency of the J = 10 ← 9 transition in the pure rotational spectrum of 12C16O. Assume the equilibrium bond length is 109.99pm. What is the Frequency in Hz? What is the corresponding wavenumber in cm-1?
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 (a) the moment of inertia of the molecule? Ans = _____ kg-m2 (b) the bond length? Ans = _____ Angstroms (Given the isotopic masses:(m(79Br) = 78.9183 amu, m(81Br) = 80.9163 amu)
5. In the microwave spectrum of 12C16O, the J1 rotational transition has been measured at 115 271.204 MHz. Calculate the value of the moment of inertia and the internuclear separation re in CO. Discuss the factors limiting the accuracy of re as compared to that of the spectroscopic measurement. (10 pts)
5. In the microwave spectrum of 12C16O, the J1 rotational transition has been measured at 115 271.204 MHz. Calculate the value of the moment of inertia and the internuclear...
A pure rotational spectrum of CO is taken using microwave spectroscopy. The data for the absorption frequencies for each rotational transition are given in the excel file on Blackboard called "Exam 4 Q3." Use the data to determine the following for CO: The rotational constant in a) cm1 b) The rotational distortion constant in cm1 c) The bond length of CO 7 Freq, MHzJ 115271.2 230538 345796 461040.8 576267.9 691473.1 806651.7 921799.7 0 1036912 1 1151985 2 1267015 3 1381995...
The vibrational-rotational spectrum of HCl consists of two branches of lines, the R-branch and the P-branch, where the R-branch lines are higher in wavenumber than the P-branch lines. The lines arise from transitions between rotational levels of the v” = 0 vibrational state and rotational levels of the v’ = 1 vibrational state of HCl. What are the quantum numbers of the upper and lower level rotational levels (i.e., J’ and J”) that correspond to the transitions that give rise...
Q 3(a) [5.33 Marks] Indicate which of the following molecules you expect will show microwave (rotational) spectra; O2, CH4, O3, N2, CHCl3 and CS2. In each case, briefly explain your answers. Q 3(b) [18 Marks] The microwave spectrum of 12C16O shows a series of lines spaced 3.824 cm-1 apart. Assuming a rigid rotor: (i) Calculate the moment of inertia for this molecule. (ii) Estimate the C-O bond length. (iii) Determine which rotational level (J) is most populated at 300 K....
(b) The rotational Raman spectrum of 1 N2 (m(N) - 14.0031u) shows a series of Stokes lines separated by 1.4567 cm, when it is exposed to monochromatic laser radiation with wavelength of 156 nm. (i) Derive the energy separation expression of the J 3 the pure rotational Raman spectrum of 1N2 1 transition in (i) Calculate the frequency of the above transition in the pure rotational Raman spectrum of 1"N2. 4
(b) The rotational Raman spectrum of 1 N2 (m(N)...
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• If the wave number of the rotational transition / -0 → 1 of 'H'Br is 16.93 cm. a- Calculate the rotational constant B (Hz) b- Calculate the bond length of HBr (8) C- Calculate the energy of 1=5 → transition (J) d- If we deuterate HBr without affecting the bond length, what will happen to the position of the absorption peak?
Question 5 The rotational energy levels of a diatomic molecule are given by E,= BJ(J+1) with B the rotational constant equal to 8.02 cm Each level is (2) +1)-times degenerate. (wavenumber units) in the present case (a) Calculate the energy (in wavenumber units) and the statistical weight (degeneracy) of the levels with J =0,1,2. Sketch your results on an energy level diagram. (4 marks) (b) The characteristic rotational temperature is defined as where k, is the Boltzmann constant. Calculate the...
(a) Arrange the following types of spectroscopic transition in order of increasing energy: vibrational, electronic, rotational. (b) In which regions of the electromagnetic spectrum do each of the transitions in part occur? (c) The red colour of tomatoes is due to the presence of lycopene, a carotenoid pigment, which absorbs strongly at 22,222 cm-1. (d) What wavelength of light does lycopene absorb? Give your answer in nm. (e) What colour is this light? (f) What type of spectroscopic transition gives...