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a small Q

Pure hexane has negligible ultraviolet absorbance above a wavelength of 200 nm. A solution of hexane prepared by dissolving 25.8 mg of benzene(C6H6, FW = 78.11 amu) in hexane and diluting to 250.00 mL had an absorbance of 0.266 in a 1.000 cm cell at a wavelength of 256nm. Find the molar absorptivity of benzene at this wavelength.

0.201 M-1 cm-1
2.58 M-1 cm-1
201 M-1 cm-1

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