The fundamental vibration mode of 1H35Cl is observed at 2886 cm-1. Assuming the force constant remains the same, the wavenumber of the corresponding mode of 2H35Cl (deuterium chloride) is approximately:

The bond dissociation energy of the OH molecule is 4.18 eV with a rotational constant of 18.8 cm-1. For rotationally induced dissociation, the minimum value of the rotational quantum number J is closest to:

Consider an emission line of wavelength λ = 550 nm of Argon (A = 40, Z = 18) at a temperature of 400 K. The full Doppler width of the emission line will be closest to: