A 4.48 mg sample of a compound has a molar mass of 158.03 g/mol was dissolved in a 1000 mL volumetric flask. A 1.00 mL aliquot was withdrawn, placed in a 10.00 mL volumetric flask, and diluted to the mark.  A 10.00 mL aliquot was placed in a 1.00 cm cell and percent transmittance of 30.9% at 520 nm. Calculate the molar absorptivity of KMnO4, at 520 nm

Q: Assuming that the sample optical path length is 1 cm, find the molar absorptivity at wavelength 1…

A: We know that Absorbance (A)=€Cl ,where €=molar absorptivity  C=concentration   l=length of the cell…

Q: 50 uL of an aqueous sample of double-stranded DNA is dissolved in 950 uL of water. This diluted…

A: GIVEN Absorbance (A) =0.326 at 260 nm Molar Absorbivity (ε) = 0.020 ng-1mL Wavelenght (λmax ) =260…

Q: 1. A compound has a molar absorptivity of 3.031 x 103 L cm-1 mol1. If a 15.00 mm-length cell is used…

A: We know that  A = 2 - log(%T) and A = € × C × l

Q: 10.  a. Light at 278 nm passes through protein RNase A with optical path length is 1μm and the…

A:

Q: Calculate the transmittance (in %) of an unknown concentration of a protein that was standardized…

A: we are required to find the transmittance % of unknown protein

Q: s prepared and its absorbance was recorded with a 0.01 cm sample cell to give 0.88 % transmittance…

A: Given, %T = 0.88 l= 0.01 cm Wavelength λ = 400 nm = 4×10-9m 1) Thienothiophene, Molar absorption…

Q: Mass spectral measurements were made on 10 replicate low concentration Ni-EDTA samples: 178.9,…

A: Given Data:Mass spectral measurements of Ni-EDTA sample are 178.9, 141.2, 158.7, 173.7, 142.7,…

Q: Calculate the absorbance, A, and percent transmittance, T, of a 0.00245 M solution that has a molar…

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Q: A student prepared several solutions of Molecule Bright, each at a different concentration. The…

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Q: Listen A dilute solution of caffeine was analyzed by UV-Visible spectroscopy and found to have a…

A: We can calculate the absorbance factor by two method which are.,  Method 1 :-  The relation between…

Q: The transmittance of a solution in 1-cm cuvette is 60.0%. Calculate the transmittance of the same…

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Q: Determining the sodium concentration in coffee with flame atomic absorption spectroscopy (FAAS) can…

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Q: A 0.012mM sample of a compound in water has a molar absorptivity of 27,2671 1/m^-1cm^-1 at 573nm in…

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Q: A 0.05 mM solution of DCPIP was placed in a 1 cm spectrophotometer cuvette and a beam of light at…

A: We know that absorbance = log (I0/I) = e*c*l

Q: A dilute solution of caffeine was analyzed by UV-Visible spectroscopy and found to have a percentage…

A: Answer:Beer-Lambert law gives a relation between molar concentration and molar absorptivity as shown…

Q: A food supplement is analyzed by Atomic Absorption Spectroscopy to know its Ca content. A 10 ppm…

A:

Q: Mass spectral measurements were made on 10 replicate low concentration Cd-EDTA samples: 181.5,…

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Q: A sample of cobalt is to be determined using absorption spectrum analysis. A 0.286 g sample of a…

A: Solution - According to the question - Given data - Absorbance of the sample solution = A1 = 2 - log…

Q: A 1.2cm diameter glass cuvette is filled with a Cu(NH3)42+ solution that is deep blue. The cuvette…

A: At 620 nm, Transmittance (T) = 23% = 23/100 = 0.23 So Absorbance (A) at 620 nm = - log T…

Q: Assuming that the sample optical path length is 1 cm, find the molar absorptivity at wavelength 1…

A: In this question a sample consists of hmr and Mr which show respective absorbance values. Together a…

Q: a) Convert the absorption value of 0.173 into % transmittance b) Convert the transmittance value of…

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Q: What is the absorbance, A, of a 0.0130 M solution with a percent transmittance of 54.0%? A = 0.2676…

A: Concentration of solution= 0.0130M Percent transmittance= 54.0% Absorbance=?

Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.