Wavelength and Absorbace
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1. What is the wavelength of an emission line for iron that has a frequency of 5.68×1014 Hz?
2. A solution of CoL3+ has a percent transmittance of 28.9 % at 565 nm in a 2.00 cm cell. The molar absorptivity for the complex at this wavelength is 2.45×104 L/(mol?cm). What is the absorbance of CoL3+ in this solution?
3. A 2.50 mL aliquot of a solution that contains 3.8 ppm iron (III) is treated with an appropriate excess of KSCN and diluted to 50.0 mL. What is the absorbance of the resulting solution at 580 nm in a 2.50 cm cell? The complex FeSCN2+ has a molar absorptivity of 7.00×103 L cm-1mol-1. (Fe - 55.845 g/mol)
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Solution Summary
How to calculate a wavelength using a given frequency of light is determined. The expert provides calculations for the absorbance of a solution based on percent transmittance. How to calculate absorbance of a solution using molar absorptivity is determined.
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. What is the wavelength of an emission line for iron that has a frequency of 5.68×1014 Hz?
To convert between wavelength and frequency, you use the formula:
ν is the frequency, c is the speed of light, and λ is the wavelength. You can plug the knowns into the equation:
2. A solution of CoL3+ has a percent transmittance of 28.9 % at 565 nm in a 2.00 cm ...
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