The vibrational frequencies for the mixture of gases shown in the Chapter 3 Connection to Instrumental Analysis include: H2 (4160 cm-1) N2 (2331 cm-1) CO (2143 cm-1), and O2 (1550 cm-1). What can you conclude about the bond orders by inspection? Calculate the force constants for each molecule to check the accuracy of your estimate.

1. Water shows the following vibrations: A₁ symmetrical stretch at 3657 cm ¹, B2 asymmetrical stretch at 3756 cm ¹, A₁ deformation at 1595 cm ¹¹. Determine which vibrations are active in IR absorption spectra and which are active in Raman spectra.

a.) What is the ratio of the number of Cl_2 molecules in the excited vibration to the number in the zero-point level. b.) Calculate the ratio of the number in the v=1 level to the total number. v_0 = 559.7 cm^-

Typically, the C=C bond is found at approximately 1500 cm³1, while the C-O bond is found at approximately 1700 cm³¹. What must account for the difference in frequency? Relative Strength of the double bond. O Mass of C vs. O O Relative Length of the double bond.

how can i get a no. of rotational modes of N2 no. of vibration modes of N2 no. of microwave active modes of N2 no. of infrared active modes of N2

Draw the Lewis structure and describe the bonding in Cr2(CH3COO)4(H2O)2 using MO theory. In the Raman spectrum an intensive line at 556 cm-1 is observed. Assign this band and calculate the force constant using the approach that only two atoms are involved in this vibration. (For comparison: Cd22+ 111 N/m and Hg22+ 169 N/m)

Match the region of the electromanetic spectrum with the type of chemical spectroscopy.    Nuclear magnetic resonance (NMR) - electron and proton resonance Options: X-rays  Microwaves Infared Radio waves Ultraviolet and visible light    Raman spectroscopy-molecular rotations  options:  X-rays  Microwaves Infared Radio waves Ultraviolet and visible light    Electron excitation (energy level changes) Options: X-rays  Microwaves Infared Radio waves Ultraviolet and visible light    IR spectroscopy - molecular vibrations  Options:  X-rays  Microwaves Infared Radio waves Ultraviolet and visible light    Ionization  Options:  X-rays  Microwaves Infared Radio waves Ultraviolet and visible light

Determine the number of vibrational modes that will be observed in (a) an Infrared experiment and (b) a Raman experiment for hydrazine (H₂N-NH2) in each of the following conformations - each one has a different point group: HH N-N HH (a) N-N HH HH (b) HH (c)