Spectroscopy
In the equation, A = ε bc, what quantity is represented by "ε"?

None of these
Path length
Absorbtivity
Molar absorbtivity

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Spectroscopy
Why is it generally preferable to use absorbance as a measure of absorption rather than % transmittance?

Because %T cannot be measured as accurately as absorbance
None of these
Because absorbance is proportional to the concentration of the analyte, whereas %T is not
Because %T is dependant on the power of the incident radiation

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Spectroscopy
Vibrational spectroscopy is

an Infrared spectroscopy
a large mass on a weak spring
a class of spectroscopic techniques which analyzes molecular motions
a flashlight through a prism and shake it

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Spectroscopy
Why are rotational transitions of little use to a spectroscopist?

Because, in liquids and solids, spectral lines corresponding to rotational transitions are broadened as the result of molecular collisions and other interactions
Because the energy required to induce a rotational transition is so small that it cannot be measured
All of these
Because rotational transitions are extremely rare

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