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Sample #1 has an absorbance of 0.300. Sample #2 is the same substance and has an absorbance of 0.600 using the same equipment. What is the relative concentration of the second sample?
The concentration of sample #2 is the square root of that of #1.
The concentration of sample #2 is that of sample #1 squared.
The concentration of sample #2 is half that of sample #1.
The concentration of sample #2 is twice that of sample #1.
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- A. Copper sulfate pentahydrate is often used to teach students about Beer’s Law by making a standard curve (linear regression). The bright blue color of the solution has a peak absorbance in the red range of the electromagnetic spectrum. The absorbance value is proportional to concentration. How many grams of CuSO4 5H2O to make up 250 mL of a 0.2 M stock of this solution? B. Using M1V1 = M2V2 how many mL would a student need to measure out in graduated cylinder to make up a 50 mL (V2) solution of 0.1M, 0.05 M, 0.025M 0.0125M solutions for a standard curve at the peak wavelenth for this compound?A. Copper sulfate pentahydrate is often used to teach students about Beer’s Law by making a standard curve (linear regression). The bright blue color of the solution has a peak absorbance in the red range of the electromagnetic spectrum. The absorbance value is proportional to concentration. How many grams of CuSO4 5H2O to make up 250 mL of a 0.2 M stock of this solution? B. Using M1V1 = M2V2 how many mL would a student need to measure out in graduated cylinder to make up a 50 mL (V2) solution of 0.1M, 0.05 M, 0.025M 0.0125M solutions for a standard curve at the peak wavelenth for this compound? I need help with part B of this question.A solution of concentration 23.27 g/L shows a certain absorbance when analyzed in a cuvette using a spectrophotometer. The solution is then diluted and absorbance re-measured. The new absorbance found to be 0.17 times the first value. What is the concentration of the diluted sample? Select one: A. 136.882 g/L B. 39.559 g/L C. 0.007 g/L D. 1.700 g/L E. 3.956 g/L
- In UV-Vis Spectroscopy, the remaining UV light that were not absorbed passes through the sample and is observed. The lambda max of coffee is at 272-274 nm. Both statements are correct. 1st statement is True. 2nd statement is False. 1st statement is False. 2nd statement is True. Both statements are False.You measure a sample in your spectrophotometer that has an absorbance of 1.00. What is the concentration of your sample in M.If a solution has an absorbance of 2 you can be certain that the solution is highly diluted and needs to be concentrated all the statements are correct this is a reliable absorbance and downstream analysis can be done the solution is highly concentrated and needs dilution
- A standard curve of absorbance vs. concentration has a linear trendline of y = 0.56x + 0.987. Use this trendline to calculate the concentration of an unknown sample that has an absorbance of 1.245.Please answer the question correctly is all I want and explain why its thats answer for the final and please answer as quickly as possible, thanks! You graph the calibration curve of a solution of an unknown metal (we will call it M+) at 400 nm. The graph is shown below. What is the concentration the solution with an absorbance of 0.500 at 400 nm?You determine the Mg concentration of a water sample using atomic absorption spectroscopy (AAS). The sample is first diluted: 4.00 mL of the water sample is diluted to a final volume of 25.0 mL. The AAS reading for the diluted sample is 1.755 ppm. What was the Mg concentration of the original water sample, in ppm? (Enter the numerical value without units.)
- What does the absorbance at 260 nm tells you? How about the 260/280 ratio?Why were the absorbance measurements recorded at lambda max (504 nm)? Question 1 options: at lambda max impurities in the sample do not absorb any light Because the allura red dye absorbs red color at 504 nm at lambda max the absorbance is the most sensitive to dye concentration at lambda max the absorbance is the least sensitive to dye concentrationDetermine the standard concentration of A through E and then the absorbance. I just need clarification on if I add together the two ml values given.
