17. A solution containing 0.525MNaNO3 exhibits 0.34 absorbance in a 3.00-cm cell at 460 nm. Calculate the molar absorptivity of NaNO3 in a unit of U cm. mg at this wavelength using Beer's Law. A. 0.215cm^-1mol^-1L B. 16.81cm^-1mol^-1L C. 0.515cm^-1mol^-1L D. 1.681cm^-1mol^-1L

To calculate the molar absorptivity of NaNO3 using Beer's Law, we can use the following formula:<br /><br />ε = A / (c * l)<br /><br />Where:<br />ε = molar absorptivity (in units of L·mol^-1·cm^-1)<br />A = absorbance<br />c = concentration (in units of mol·L^-1)<br />l = path length (in units of cm)<br /><br />Given information:<br />- Absorbance (A) = 0.34<br />- Concentration (c) = 0.525 M<br />- Path length (l) = 3.00 cm<br /><br />Substituting the given values into the formula:<br /><br />ε = 0.34 / (0.525 * 3.00)<br />ε = 0.215 cm^-1 mol^-1 L<br /><br />Therefore, the correct answer is A. $0.215cm^{-1}mol^{-1}L$.