7 2 points
You use the spectrophotometer to measure the absorbance of an unknown sample of ortho-nitrophenol.
Your absorbance reading is 0.485 A
Use the standard curve shown here to give an estimate of the concentration of the ortho-nitrophenol. Don't forget to include the unit of measure in your answer.
Your estimate must be within 15 units of the actual concentration. Only include the concentration and the unit in your answer.