A compound with molecular mass 292.16 g/mol was dissolved in a 5-mL volumetric flask. A 1.00 mL aliquot was withdrawn, placed in a 10 mL volumetric flask, and diluted to the mark. The absorbance at 340 nm was 0.427 in a 1.00 cm cuvette. The molar absorptivity at 340 nm is ε340 = 6130 M–1 cm–1.
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