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July 30, 2015

Homework Help: chemistry university

Posted by angela on Monday, April 15, 2013 at 4:45am.

A 179 mL solution of a copper complex with a molecular weight of 491.9 g mol-1 was made. The absorbance of the solution at 638 nm wavelength was 0.376 using a 1 cm cuvette. It is known that this copper complex has a molar absorptivity (extinction coefficient) of 324.4 M-1 cm-1 at this wavelength.What was the mass of the copper complex dissolved in the solution in mg? Report your answer to 3 significant figures.

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