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Question 1 10 pts What is the absorption coefficient, a, of a substance in a 1...
A solution contains 0.00750M of a first compound with an extinction coefficient of 22.4cm−1M−1. A second...
A solution contains 0.00750M of
a first compound with an extinction coefficient of 22.4cm−1M−1. A
second compound is added to the solution at a concentration of
0.0260M. The absorbance of the resulting solution is 0.324 with a
path length of 1.00cm. What is the extinction coefficient for the
second compound in the solution? Round the answer to three
significant figures. Give the answer to three significant
figures.
A solution contains 0.00750 M of a first compound with an extinction coefficient...
6) According to the Beer-Lambert Law, what would happen to the absorbance of a solution if...
6) According to the Beer-Lambert Law, what would happen to the absorbance of a solution if the concentration of analyte (substance being studied) is tripled? 7) At a wavelength of 447 nm, the absorbance of a solution that is 5X10M in the FeSCN complex is found to be 0.981. Assuming this is accurate, calculate the molar absorption coefficient (absorptivity) for the complex if the optical path length is 1.0 cm.
answer please Question 1 12.5 points Save Answer The complex that is formed between galium (1)...
answer please
Question 1 12.5 points Save Answer The complex that is formed between galium (1) and B-hydroxyquinoline has an absorption maximum of 568nm. A 0.0082M solution of the complex has a transmittance of 42.9% when measured in a 1.00-cm cell at this wavelength. Calculate the molar absorptivity of the compex. Question 2 of 8 Question 2 12.5 points Save Answ Chromium(III) forms a complex with diphenylcarbazide whose molar absorptivity is 4.17X104 at 540 nm. Calculate the path length in...
Use spectroscoplc methods to measure reaction rates Question A solution contains 0.0125 M of some compound. The ab...
Use spectroscoplc methods to measure reaction rates Question A solution contains 0.0125 M of some compound. The absorbance through a path length of 1.00 cm is 0.364. A second compound with an extinction coefficient of 15.2 cmM is added to the solution, and the absorbance through the path length of 1.00 cm increases to 0.455. What is the concentration of the second compound in the solution? Give the answer to three significant figures. Sorry, that's Incorrect. Try again? M
QUESTION: The ultraviolet of benzonitrile shows a primary absorption band at 224 nm and a secondary...
QUESTION: The ultraviolet of benzonitrile shows a primary absorption band at 224 nm and a secondary band at 271 nm. a) If a solution of benzonitrile in water, with a concentration of 1 x 10-4 molar, is examined at a wavelength of 224 nm, the absorbance is determined to be 1.30. The cell length is 1 cm. What is the molar absorptivity of this absorption band?
Please explain in detail so I can understand both of the questions. Thankyou. Please also take...
Please explain in detail so I can understand both of the
questions. Thankyou.
Please also take into account the mantissa significant figures
which is a requirement for the two questions.
3. Calculate the absorbance of a solution given that the transmission is 37.8%. 4. Given that the concentration of the compound giving rise to the absorption (A-0.4520) is 8.62 mmol L1, what is the molar absorption coefficient when measured through a cell of length 0.20 cm?
The absorption coefficient of bovine immunoglobulin at 280 nm is 210,000 M-1 cm-1 . what is...
The absorption coefficient of bovine immunoglobulin at 280 nm is 210,000 M-1 cm-1 . what is the absorbance of a 0.1 mg ml-1 solution across a 1 cm path? what percentage of the incident light is transmitted by this solution? mw (150,000 D)
11A.2 What is (a) the wavenumber, (b) the wavelength of the radiation used by an FM radio transmitter broadcasting at 8...
11A.2 What is (a) the wavenumber, (b) the wavelength of the radiation used by an FM radio transmitter broadcasting at 88.0 MHz? 11A.3 An aqueous solution of a triphosphate derivative of molar mass 502 g mol-' was prepared by dissolving 17.2 mg in enough water to make 500 cm of solution and a sample was transferred to a cell of length 1.00 cm. The absorbance was measured as 1.011. Calculate (a) the molar absorption coefficient; (b) the transmittance, expressed as...
2) An organic diprotic acid has an absorption spectrum that depends on pH. The spectra shown belo...
2) An organic diprotic acid has an absorption spectrum that depends on pH. The spectra shown below show the absorbance of three solutions with different pH values. Each solution had a concentration of 0.0100M. The cell pathlength is 1.00 cm. The dissociation constants of the acid are Ki 103 and K2-1011 a) What are the equilibrium concentrations of the H2A, HA, and A2 forms at each pH? b) What is the molar absorptivity of each form at 630 nm? c)...
Page 9 Questions 1. A substance exhibits an absorbance of 0.47 in a 1.00 cm cell...
Page 9 Questions 1. A substance exhibits an absorbance of 0.47 in a 1.00 cm cell at 525 nm. (a) What will be its absorbance in a 2.7 cm cell? (b) If the substance concentration is 2.1 x 10-5 mol dm, compute its molar absorptivity. (c) What absorbance will it have in a 5.0 cm cell at 2. = 405 nm (think about it!)? 2. You are setting up an absorption spectrometer to determine the concentration of a gas which...
A solution contains 0.00750M of
a first compound with an extinction coefficient of 22.4cm−1M−1. A
second compound is added to the solution at a concentration of
0.0260M. The absorbance of the resulting solution is 0.324 with a
path length of 1.00cm. What is the extinction coefficient for the
second compound in the solution? Round the answer to three
significant figures. Give the answer to three significant
figures.
A solution contains 0.00750 M of a first compound with an extinction coefficient...
6) According to the Beer-Lambert Law, what would happen to the absorbance of a solution if the concentration of analyte (substance being studied) is tripled? 7) At a wavelength of 447 nm, the absorbance of a solution that is 5X10M in the FeSCN complex is found to be 0.981. Assuming this is accurate, calculate the molar absorption coefficient (absorptivity) for the complex if the optical path length is 1.0 cm.
answer please
Question 1 12.5 points Save Answer The complex that is formed between galium (1) and B-hydroxyquinoline has an absorption maximum of 568nm. A 0.0082M solution of the complex has a transmittance of 42.9% when measured in a 1.00-cm cell at this wavelength. Calculate the molar absorptivity of the compex. Question 2 of 8 Question 2 12.5 points Save Answ Chromium(III) forms a complex with diphenylcarbazide whose molar absorptivity is 4.17X104 at 540 nm. Calculate the path length in...
Use spectroscoplc methods to measure reaction rates Question A solution contains 0.0125 M of some compound. The absorbance through a path length of 1.00 cm is 0.364. A second compound with an extinction coefficient of 15.2 cmM is added to the solution, and the absorbance through the path length of 1.00 cm increases to 0.455. What is the concentration of the second compound in the solution? Give the answer to three significant figures. Sorry, that's Incorrect. Try again? M
Please explain in detail so I can understand both of the
questions. Thankyou.
Please also take into account the mantissa significant figures
which is a requirement for the two questions.
3. Calculate the absorbance of a solution given that the transmission is 37.8%. 4. Given that the concentration of the compound giving rise to the absorption (A-0.4520) is 8.62 mmol L1, what is the molar absorption coefficient when measured through a cell of length 0.20 cm?
11A.2 What is (a) the wavenumber, (b) the wavelength of the radiation used by an FM radio transmitter broadcasting at 88.0 MHz? 11A.3 An aqueous solution of a triphosphate derivative of molar mass 502 g mol-' was prepared by dissolving 17.2 mg in enough water to make 500 cm of solution and a sample was transferred to a cell of length 1.00 cm. The absorbance was measured as 1.011. Calculate (a) the molar absorption coefficient; (b) the transmittance, expressed as...
2) An organic diprotic acid has an absorption spectrum that depends on pH. The spectra shown below show the absorbance of three solutions with different pH values. Each solution had a concentration of 0.0100M. The cell pathlength is 1.00 cm. The dissociation constants of the acid are Ki 103 and K2-1011 a) What are the equilibrium concentrations of the H2A, HA, and A2 forms at each pH? b) What is the molar absorptivity of each form at 630 nm? c)...
Page 9 Questions 1. A substance exhibits an absorbance of 0.47 in a 1.00 cm cell at 525 nm. (a) What will be its absorbance in a 2.7 cm cell? (b) If the substance concentration is 2.1 x 10-5 mol dm, compute its molar absorptivity. (c) What absorbance will it have in a 5.0 cm cell at 2. = 405 nm (think about it!)? 2. You are setting up an absorption spectrometer to determine the concentration of a gas which...
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