If chlorophyll had absorption peaks at 550 nm and 650 nm rather than 425 nm and 660 nm what colour would the leaf appear to your eyes?

Q: The functional groups in an organic compound can frequently be deduced from its infrared absorption…

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Q: In what wavelength range would you expect to find the maximum in the absorption spectrum of the dye…

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Q: Suppose you are analyzing mercury ions (Hg2+) in drinking water samples with atomic absorption…

A: A) Hg^2+   To accurately determine the concentration of mercury ions (Hg2+) in a sample using…

Q: Methyl butanoate mass spectrum was obtained at 70eV. When the electron energy is lowered to a few eV…

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Q: What information can be obtained from IR and Raman spectra and how this can be applied in COSMETIC…

A: IR active molecules are Raman inactive and vice-versa.

Q: Establish the difference between the multiplicity of a signal and the integral (integration) of the…

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Q: 1-While cleaning out a laboratory shelf, you have made a mistake in labeling two bottles of phenol…

A: Infrared spectroscopy is the study of how infrared radiation interacts with matter by absorption,…

Q: 7. Suppose you are an employee of a plastics firm and you are assigned the task of identifying a…

A: The infrared spectrum of a polymer or rubber is a profile of its absorption characteristics plotted…

Q: What is the dissociation energy, D (in kJ/mole) for this Morse oscillator?

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Q: Discuss how the process of nuclear magnetic resonance is used to identify the structure of organic…

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Q: A 10 ppm solution of lead produces an absorption signal of 12%; what is the atomic absorption…

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Q: Describe different types of shifts in UV/VIS spectroscopy and give examples of they might occur?

A: Answer-  UV/Visible  spectroscopy - The Principle of UV-Visible Spectroscopy is based on the…

Q: what is the relationship between absorbance and transmittance? kindly explain it briefly

A: Incident light can be defined as the light that strikes on a solution.

Q: In the chemical literature, NMR data is not presented as the entire spectra because that would take…

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Q: i) Discuss the differences between the AES and XPS in terms of principle and information obtained…

A: X-ray Photoelectron Spectroscopy (XPS) also known as Electron Spectroscopy for Chemical Analysis…

Q: Show COMPLETE solutions. Round-off FINAL answer to the 4th decimal The absorption coefficient of…

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Q: 7. (a) Explain why absorption of UV-vis is typically recorded as broad absorption maxima.

A: UV-vis Spectroscopy can be defined as a quantitative technique that is used for measuring how much…

Q: 3. A solution of [FeSCN]2+ is found to have 31.8 % transmission at 447 nm. If the molar absorption…

A: Given: Transmittance = 31.8% Molar absorption coefficient (ε) = 4400

Q: What are the main Chemical Interferences that affect the absorption of atomic line in AAS?

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Q: What is the modulated wavelength of mercury vapor light at a temperature of 88°F and barometric…

A: Given: Frequency of modulation of mercury vapor light = 30 MHz = 30 x 106 Hz = 3.0 x 107 s-1…

Q: You measure that the %T of a sample at 850 nm is 20%. What is the absorbance of this sample? Report…

A: Given Wavelength = 850 nm% T = 20 %Absorbance = To be determined

Q: If you read the ingredients list for Cherry Kool-Aid it also lists RD&C Blue 1 as a dye present in…

A: Before determining concentration of any unknown sample, we need to measure absorbance of several…

Q: Total Valence Electrons: Hydrocyanic acid Val E. = - ½ BE = -NBE = FC = НCN Remaining Electrons: Val…

A: Solution: Total valance electron is calculated as below: HCN: 1+4+5 =10. Since carbon is less…

Q: In a spectrometer operating at 400.130 000 MHz for 1H, on the δ scale what separation of peaks in…

A: Separation between two peaks in part per million (ppm) is known as chemical shift. It is calculated…

Q: Why does a compound that has a visible absorption maximum at 480 nm (blue-green) appear to be red?

A: Given observation,  Absorption maximum of compound in the visible region is 480nm (blue-green) but…

Q: The absorbance of a mixture at a specified wavelength is the total of the absorbances of each…

A: We have to tell whether the given statement on addit8ve property of absorbance 8s true or false

Q: 2. Which of the following best describes the relationship between excitation and emission for…

A: In fluorescence spectroscopy, the excitation wavelength is shorter than the emission wavelength.The…

Q: difference with UV single beam vs double beam and how does it affect absorbance?

A: In a single beam spectrophotometer absorbance at some certain fixed wavelength is recorded to known…

Q: Why are n-π* transitions generally of low intensities/low absorptions?

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Q: The IR frequency of C=N in fac-[IrCl3(C=N)3] is 2200 cm-!. Estimate the IR frequency of C=N_for…

A: The above question is a well example of the variation of bond strength by changing the ligand…

Q: (c) Aqueous solutions of Co2+ salts are pale pink. They contain the complex ion [Co(H₂O)]2+.…

A: (c) To provide explanation for the difference in transition energies for both the complexes and why…

Q: In infrared spectra, the O-H vibrational frequency of alcohols occurs as a broad peak (peak…

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Q: what is difference between Transmittance and absorbance in spectroscopy?

A: The main difference between transmittance and Absorbance is that transmittance measure how much…

Q: 5. n5° of dichloromethane is 1.4244. If a 0.97 g sample of pure dichloromethane was contaminated…

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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.