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Unformatted text preview: gave an absorbance of 0.262 in an atomic absorption analysis. Then 1.00 mL of a solution containing 100.0 g/mL Cu +2 was mixed with 95.0 mL of unknown, and the mixture was diluted to 100.0 mL in a volumetric flask. The absorbance of the new solution was 0.500. a) Denoting the initial, unknown concentration as [Cu 2+ ] i , write an expression for the final concentration, [Cu +2 ] f , after dilution. Units of concentration are ug/mL. b) In a similar manner, write the final concentration of added standard Cu 2+ , designated as [S] f . c) Find [Cu 2+ ] i in the unknown....
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- Mass Spectrometry