A spectrophotometer was calibrated with a 6.768 10-4 M (in Cu) Cu-neocuproine solution. This calibration was carried ou

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answerhappygod
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A spectrophotometer was calibrated with a 6.768 10-4 M (in Cu) Cu-neocuproine solution. This calibration was carried ou

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A spectrophotometer was calibrated with a 6.768 10-4 M (in Cu) Cu-neocuproine solution. This calibration was carried out in a 1.00 cm cell, and yielded an absorbance of 0.2820 AU. An unknown was then analyzed in this same spectrophotometer, but using a 2.50 cm cell. If the absorbance of the unknown was 0.4880 AU, what is the Cu concentration?
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