Spectroscopy
Which of the following will oscillate the fastest?

A small mass on a weak spring
A small mass on a stiff spring
A large mass on a stiff spring
A large mass on a weak spring

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

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

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Spectroscopy
In the past, IR spectra had to be aquired one wavelength at a time, which took a long time. Today quick spectra is due to the

light is faster today that it used to be
the Fourier Transfer Algorithm allows us to scan all frequencies at once
absence of broad spectrum of wavelenth
None of these

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

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

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Spectroscopy
Vibrational spectroscopy is

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

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