Questions from General Chemistry

Q: Calculate the wavelength in centimeters of (a) An airport

Calculate the wavelength in centimeters of (a) An airport tower transmitting at 118.6 MHz. (b) A VOR (radio navigation aid) transmitting at 117.95 kHz. (c) An NMR signal at 105 MHz. (d) An infrared a...

Q: A sophisticated ultraviolet/visible/near-IR instrument has a

A sophisticated ultraviolet/visible/near-IR instrument has a wavelength range of 189 to 2900 nm. What are its wavenumber and frequency ranges?

Q: A typical simple infrared spectrophotometer covers a wavelength range from 3 to

A typical simple infrared spectrophotometer covers a wavelength range from 3 to 15 µm. Express its range (a) In wavenumbers and (b) In hertz.

Q: Calculate the frequency in hertz and the energy in joules of an

Calculate the frequency in hertz and the energy in joules of an X-ray photon with a wavelength of 1.66 Å

Q: Calculate the wavelength and the energy in joules associated with a signal

Calculate the wavelength and the energy in joules associated with a signal at 220 MHz

Q: Calculate the wavelength of a) The sodium line at 589

Calculate the wavelength of a) The sodium line at 589 nm in an aqueous solution with a refractive index of 1.35. b) The output of a ruby laser at 694.3 nm when it is passing through a piece of quart...

Q: What are the units for absorptivity when the path length is given

What are the units for absorptivity when the path length is given in centimeters and the concentration is expressed in (a) Parts per million? (b) Micrograms per liter? (c) Mass-volume percent? (d) Gr...

Q: Express the following absorbances in terms of percent transmittance. (

Express the following absorbances in terms of percent transmittance. (a) 0.0356 (b) 0.909 (c) 0.379 (d) 0.092 (e) 0.485 (f) 0.623

Q: Convert the accompanying transmittance data to absorbances. (a)

Convert the accompanying transmittance data to absorbances. (a) 27.2% (b) 0.579 (c) 30.6% (d) 15.29% (e) 0.093 (f) 79.6%

Q: Calculate the percent transmittance of solutions that have twice the absorbance of

Calculate the percent transmittance of solutions that have twice the absorbance of the solutions in Problem 22-14. Absorbance of the solution in problem 22-14: a) %T = 92.1% b) %T = 12.3 c) %T = 41...