The transmittance of an aqueous solution that contained Cu²⁺ ions at a concentration of 0.05 mol L^-1 at 600nm was measured at 0.30 in a cell of length 1.0 cm. The molar absorption coefficient is:

An absorption occurs in the infrared spectrum at 1700 cm⁻¹. The energy of this transition is:

The spacing between the rotational lines in the microwave spectrum of the ³⁵Cl¹⁶O radical is 1.2490 cm⁻¹. If the reduced mass of ClO is 1.824 × 10⁻²⁶ kg, the Cl−O bond length is:

Which of the following will not show infrared spectra

¹H¹⁹F absorbs infrared radiation of wavenumber 4138cm⁻¹. Calculate the force constant of the HF bond, if the reduced mass is 1.58 × 10⁻²⁷ kg.

How many vibrational modes exist for the molecule N₂O?

Hydrogen bromide (¹H⁸¹Br) has a vibrational wavenumber of 2649 cm⁻¹. The energy difference between v = 0 and v = 1 levels is:

In order of increasing energy, the lines observed in Raman spectroscopy are:

In a ¹H NMR spectrum recorded on a 600 MHz spectrometer, a signal is observed at 2.5 ppm relative to the standard (at 0 ppm). Calculate the frequency of absorption giving rise to this signal.

Which of the following is true for rotational spectroscopy?