Parsol 340 is one of the active ingredients they put inside sunscreen.  A calibration curve for the absorbance of Parsol 340 can be seen below.  If I measured a solution of Parsol 340 and it had an absorbance of 0.019, what must the concentration (in μM) of this Parsol 340 solution be? Answer to 1 decimal place.

Complete this statement:From the calibration curve of Parsol 340 in the previous question, we were able to our answer as the absorbance falls our known data points collected so we are we have the correct value.  If we tried to determine the concentration of a sample with an absorbance of 1.2, we would need to this result as the result falls our known data points collected and we would be if we have the correct value.

Suppose you measure the absorbance of a yellow dye solution in a 1.00 cm cuvette (b=1.00 cm).The absorbance of the solution at 427 nm is 0.44 . If the molar absorptivity of yellow dye at 427 nm is 27400 M–1cm–1, what is the concentration of the solution in M?

Assume that you are asked to prepare a set of five, 1ml standards to measure β-carotene. You have been given a stock solution of 10mg/ml and you must design the concentrations of your standards to provide an appropriate range that reflects the β-carotene concentrations found in hexane extractions from various fruits. When you measure the absorbance of your five standards, your lowest concentration in the set returns an absorbance of 0.1. What would the concentration of β-carotene be in the lowest concentration standard? Round answers to 3 sf.Note: the molar absorptivity for β-carotene at 444nm in hexane is 127,500 M-1cm-1. The Mwt of β-carotene is 536.89 g/mol.Selected Answer: [None Given]Answers: A. 400ng/mlB. 421ng/mlC. 338ng/mlD. 444ng/mlE. 150ng/ml

Examine the given Beer's law standard curve for an unknown dye measured in a 1.0 cm cuvette.What is the concentration (in M) of a sample of the unknown dye with an absorbance of 0.15 at 542 nm?

Examine the given Beer's law standard curve for an unknown dye measured in a 1.0 cm cuvette.What is the concentration (in M) of a sample of the unknown dye with an absorbance of 0.23 at 542 nm?