Final answer:
The correct extinction coefficient is (c) 150 mM⁻¹cm⁻¹.
Step-by-step explanation:
The extinction coefficient (also known as molar absorptivity) is a measure of how strongly a substance absorbs light at a particular wavelength. It is commonly denoted by the symbol ε (epsilon). The given options represent different values for the extinction coefficient.
In this case, the correct choice is (c) 150 mM⁻¹cm⁻¹. This value signifies that a solution with a concentration of 1 mM (1 millimolar) will absorb 150 units of light per centimeter at the specified wavelength. Extinction coefficients are essential in spectrophotometry to quantitatively analyze the concentration of a substance in a solution based on its absorbance.
It's crucial to choose the correct extinction coefficient for accurate concentration determination, and in this context, 150 mM⁻¹cm⁻¹ is the appropriate value.