Chapter 3, Problem 2P

Calculate the wavenumber of the rotational transition from J=1 to J=2 of the HCl bond. The reduced mass of the molecule is 1.61x10-27 kg and its bond length is 1.275 Angstroms.

Estimate the centrifugal distortion constant for 1H127I, for which ᷉  B = 6.511 cm−1 and ᷉v = 2308 cm−1. By what factor would the constant change when 2H is substituted for 1H?

A student uses visible spectrophotometry to determine the concentration of CoCl2(aq)CoCl2(aq) in a sample solution. First the student prepares a set of CoCl2(aq)CoCl2(aq) solutions of known concentration. Then the student uses a spectrophotometer to determine the absorbance of each of the standard solutions at a wavelength of 510nm510nm and constructs a standard curve. Finally, the student determines the absorbance of the sample of unknown concentration. The original solution used to make the solutions for the standard curve was prepared by dissolving 2.60g2.60g of CoCl2CoCl2 (molar mass 130.g/mol130.g/mol) in enough water to make 100.mL100.mL of solution. What is the molar concentration of the solution? a.) 0.200M b.) 0.500M c.) 1.00M d.) 5.00M

If the populations of two levels of energies E₁ and E, and statistical weights g; and g¡(E¡ < Ej) are found to be n, and nj, respectively, find an expression for the excitation temperature of this transition.

What is the difference between an absorption spectrum and a standard curve?

Convert the following Transmittance to absorbance:  T=0.305

A 2.0 mm cell was filled with a solution of benzene in a non-absorbing solvent. The concentration of the benzene was 0.010 mol dm−3 and the wavelength of the radiation was 256 nm (where there is a maximum in the absorption). Calculate the molar absorption coefficient of benzene at this wavelength given that the transmission was 48 per cent. What will the transmittance be through a 4.0 mm cell at the same wavelength?

How do I go from frequency (eV) to wavenumber (cm-1)?

The molar absorption coefficient of a solute at 540 nm is 386 dm3 mol−1 cm−1. When light of that wavelength passes through a 5.00 mm cell containing a solution of the solute, 38.5 per cent of the light was absorbed. What is the molar concentration of the solute?