Cu Absorbance 1 Absorbance 2 Absorbance 3 Mean + SD standard (ppm) 1 0.0521 0.0520 0.0522 2 0.1011 0.1012 0.1013 3 0.1576 0.1578 0.1577 4 0.2119 0.2120 0.2121 0.2688 0.2681 0.2685 Unknown Absorbance 1 Absorbance 2 Absorbance 3 Mean + SD sample Water 0.1649 0.1648 0.1701 sample 1 (1:10 dilution)

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A:

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