A student measures the absorbance at Amax = 500 nm of several standard solutions of Red Dye #3 and then plots the absorbance versus the solution concentration as shown in the graph below. Use this information to answer the next four questions. 1.8 1.6 1.4 1.2 y = 0.034x +0.001 R=1 ABSORBANCE 0.8 0.6 0.4 0.2 0 OOOO on No 15 20 25 30 35 40 45 50 Concentration (UM) 3. What are the units of the slope? * Slope is absorbance / concentration but if vetering to what slog represents which is Exxb then the units are cnim" 4. How many standard solutions were used to create the graph? one 5. If the student used a cuvette with a 1.00 cm path length, what is the molar absorptivity of Red Dye #3 at 500 nm expressed in cm M-1? A - E, bc 0.034cmimi Molar absortivity