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.

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.

For determining the purity of a given DNA sample, what absorbance ratio is used?

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

In the determination of selenium content in soil samples, the following table shows theinstrument response against the concentration of selenium solution.Concentration (ppm) Signal20 2.2540 4.7880 9.98120 14.2160 18.9(i) A soil sample solution was measured three times and gave an average signal of8.67. Calculate the predicted concentration of selenium in the solution from thecalibration curve above.(ii) Calculate also the standard uncertainty of the result in part (a) due to thecalibration curve.(See example on Appendix 1 of "Principles of Instrumental Analysis" fromHoller, Skoog and Crouch)(25%)

If the transmittance of a substance was determined as 20% what is the absorbance? Question 46Select one: a. 0.3 b. 1.633 c. 0.1 d. 0.7 e. none of the other choices is true