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A 5.00-mL aliquot of a solution that contains 4.74 ppm Cu2+ is treated with an appropriate excess of 1,10-phenanthroline and diluted to 50.0 mL. The molar absorptivity of a Cu2+- 1,10-phenanthroline solution at 435 nm is 6940 L mol-1 cm-1. What is the absorbance of the above diluted Cu2+- 1,10-phenanthroline solution at 435 nm in a 10.00-cm cell?

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