A 92.0 mg sample of a mixture containing a compound Z (FM = 384.63 g/mol, e =

1.63x103 M-1cm-1) was dissolved in a 50.00-ml volumetric flask. A 2.00 mL aliquot was

transferred to a 10.00-mL volumetric flask and diluted to the mark. A portion of the 10-mL sample was placed in a 0.500-cm cuvet and gave an absorbance of 0.636 at 495 nm. A blank solution containing only the solvent had an absorbance of 0.002 at the same wavelength.

a. What is the concentration (mol/L) of the compound in the 10.00-mL flask?

b. What is the concentration (mol/L) of the compound in the 50.00-mL flask?

c. What is the mass (mg) of compound Z in the 92.0 mg sample?