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An unknown sample of Cu2+ gave an absorbance of 0.263 in an atomic absorption analysis. Then, 1.00 mL of solution containing 133.00 ppm Cu2+ was mixed with 91.00 mL of unknown, and the mixture was diluted to 100.00 mL in a volumetric flask. The absorbance of the new solution was 0.490. Find [Cu2+] (ppm units) in the unknown.

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Collen Von
Collen VonLv2
24 Jan 2019
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