analytical chemistry

Question 3

You must measure the absorbance of a sample with a concentration of 112(+/-1.3) mM. You can assume that the beam path is 1.01 (+/-0.2) cm and the molar absorptivity is 12.38 (+/-0.12) L.mol^-cm^-.

a) Calculate the measured absorbance and its error. You can assume that Lamberts Beer's law applies.

b) If you could increase the accuracy of all parameters (beam path and molar absorptivity) contributing to error, which would be most beneficial to change if you were to perform measurements under similar conditions?