How do I calculate the concentration from only being given the absorbance as shown below? We were given nothing else nor taught how to do this problem. We are given the "Allura red stock solution (M) as 1.89E-04.

28. Generate a standard curve using all of the samples of known concentration and use it to interpolate the concentration of Allura Red in your Kool-Aid unknown. Don't forget to account for the dilution factor 29. Enter all data into the spreadsheet before leaving lab Post-Lab: (Show all your work for calculations) Concentration Allura Red Used: _ Show concentration calculations here (4pts)