A chemical dye absorbs light with wavelength 578 nm.
Using a standard solution of concentration 0.7 mM, the absorption is measured
to be 0.8 units. The absorption for a solution of unknown concentration is then
measured and found to be 0.6 units. What is the concentration? Give the answer to
at least 3 significant figures.
A = εmC +b
578× 0.8× 0.6×0.7= 194.21
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