A Substance, X, Has a Molar Absorptivity of 1250 L

question 5

Multiple Choice

A substance, X, has a molar absorptivity of 1250 L mol^-1 cm^-1 at 325 nm. A sample of X gives an absorbance of 0.8 when measured in a UV-visible spectrophotometer at 325 nm with a path length of 1 cm. What is the concentration of the sample of X?

• A) 1000 mol L^-1
• B) 1 mol L^-1
• C) 1563 mol L^-1
• D) 6.4  10^-4 mol L^-1
• E) 1.56 mol L^-1

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