What is the concentration of a sample that transmits 70% signal at a certain wavelength upon analysis? The molar absorptivity is 2.0 and the cuvette used has a width of 1.0 cm.  Additionally, (a) What is the absorbance of the sample at this wavelength? b) And what is the fraction of light that would be transmitted by the sample if the concentration is increased three times?

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Q: absorbance

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