What is threshold frequency?

Q: What are the analytical applications of Atomic Fluorescence Spectroscopy?

A:

Q: Define wavelength and fwhm (peak width at half the maximum height) of visible absorption.

A: A propagating disturbance in space is called wave. They generally travel in straight line through a…

Q: By what factor will you change the concentration as you monitor the absorbance/transmittance of the…

A: The term absorbance refers to the measure of the quantity of light which has been absorbed by the…

Q: Beer's Law describes the linear relationship between: a.) absorption and wavelength b.) absorption…

A: Beer's law (also called the Beer-Lambert law) states that the absorbance is proportional to the path…

Q: Which changes in parameter lead to a change either increasing or decreasing signal intensity of…

A: Signal intensity of ionization refers to the intensity of that signal which has maximum intensity.…

Q: How many vibrational normal modes does the molecule FNO possess?

A: FNO is a linear molecule with 3 atoms (n = 3):

Q: Each individual part in an atomic absorption spectrophotometer has a specific function. Below is…

A: Atomic Absorption Spectroscopy is a technique of qualitative analysis of chemical elements using the…

Q: For a quinine solution (exposed to air) vs that of the similar solution which has been bubbled with…

A: Fluorescence Many compounds absorb ultraviolet or visible light and undergo electronic…

Q: The distance between one point on a compression and the corresponding point on the next compression…

A:

Q: Compare the advantages and disadvantages of atomic absorption and inductively coupled plasma Atomic…

A:

Q: The IR spectrum of a compound with molecular formula C5H8O is shown below. Identify the compound.

A: Given: The molecular formula of the given compound is C5H8O Identification of given compound: The…

Q: is the process of removing background absorption from from a sample

A: Ans Atomic absorption spectroscopy is the process of removing background absorption from a sample

Q: b) Draw a Jablonski Diagram that illustrates the formation of absorption and subsequent emission of…

A: (B)Jablonski Diagram is the diagrammatic representation of the options open to a molecule to…

Q: Why is fluorescence generally more sensitive than absorption measurements

A: Why is fluorescence generally more sensitive than absorption measurements?

Q: How would the position of a spectral line change as  the distance L between the grating and the…

A: The distance between the center of the pattern and mth spectral line can be calculated using the…

Q: 55 50 15 10- 5- -5 -10 -15. 4000 3500 3000 2500 2000 1500 1000 500 Wavenumbers (cm-1) %Transmittance…

A: The IR helps to find out the correct  functional group in the given compound .

Q: The intensity of the radiation from an object is found to be a maximum at 282 GHz (1 GHz = 109 Hz).…

A: According to Wein's the temperature of the black body can be calculated as it states that the…

Q: Five compounds are shown  of the IR spectra below. Indicate which of the five compounds is…

A: IR spectroscopy is a technique which is used to determine the actual structure of a compound. It…

Q: Why are wavlength maxima different for UV-Vis and Fluorescence?

A: Any molecule has quantized electronic levels.  These levels differ largely in energy as compared to…

Q: y If y = 36 and x = 6, what is the signal-to-noise ratio?

A: Signal to noise ratio is the ratio of desired noise to the background noise and it is expressed in…

Q: Principle of fluorescence spectroscopy

A: Answer

Q: the rotational frequency spectrum of a diatomic molecule

A: Microwave rotational spectroscopy uses microwave radiation to measure the energies of rotational…

Q: The following diagram shows electronic and vibrational (vibronic) levels for a diatomic molecule.

A: The question offers two figures representing the diagram of electronic and vibrational (vibronic)…

Q: Compare Time Domain-NIRS, CW-NIRS and Frequency Domain-NIRS? Derive and  explain

A: •The time-space (TD) method in close infrared spectroscopy (NIRS) has the best potential among the…

Q: 100 4000 3000 2000 1500 Wavenumber, cm 1000 500 1 ppm Transmittance %

A:

Q: 5. Why derivative plot is important in ESR spectrum?

A: This Question is based upon ESR Spectroscopy.

Q: 5- The vibrations in infrared spectroscopy might be active or inactive?

A: IN order for a vibrational mode to absorb infrared light, it must result in a periodic change in the…

Q: What does the imaginary frequency observed for the transition state correspond to?

A: The vibrational spectrum of a transition state is characterized by one imaginary frequency (implying…

Q: Answer the following questions in minimum 5 sentences  How does an electronic transition resemble a…

A:

Q: Why is emission energy lower than absorption energy?  Please answer shorty at your own words. Answer…

A: Emission occurs when electrons return to their energy levels. Absorption occurs when electrons jump…

Q: how can you test fluorescence and phosphorescence mechanisms

A: Fluorescence and phosphorescence are types of molecular luminescence methods. A molecule of analyte…

Q: Can we expect that a plot of relative fluorescence intensity vs. concentration to be linear?

A: The fluorescence intensity basically tells about emitted light. The extent of emission is defined as…

Q: 40 3800 3600 3400 3200 3000 2800 2600 2400 2200 2000 1800 1600 1400 1200 1000 B00 600 Wavenumber…

A: Diphenyl methanol means Ph-CH(OH)-Ph contains O-H group, Ph groups.  Some important peaks which are…

Q: what is the covalency number of an excited state nitrogen?

A:

Q: Spectrum (2] 100 50 4000 3500 3000 2500 2000 1500 1000 500 Wavenumber (cm) % Transmittance

A: In given IR spectra we can see broad peak at ~3400cm-1  , which indicates presence of OH group. So…

Q: what could be done improve the measurements you used to calculate Rf?

A: The Rf value of a compound is equal to the distance traveled by the compound divided by the distance…

Q: can the frequency and singlts be found based on the two spectrs for 1HMR and 2CMR and both of them…

A: We are provided the 1H NMR and 13C NMR spectra.

Q: What is could be the calculated lambda max of this compound?

A:

Q: 100 50 966 500 2000 1500 2000 3000 4000 wavenumber am Transmittance $%T

A:

Q: 100- 80- 60- 40- 20- 3500 3000 2500 2000 1500 1000 Wavenumber (cm-1) -1027 1095 1337 1378 1455 -1602…

A:

Q: The mass, IR, and 1H-NMR spectra of a compound are shown below. Suggest a possible structure for the…

A: Elucidation of structure of organic molecule from spectral data.

Q: The number and position of electronic spectral bands depend on some factors. Explain.

A: Electronic spectroscopy – It depends on the nature of energies emitted by electrons. This…

Q: If the vibrational frequency of 1802 is 1764 cm-1, what is the spring constant a.1560 N/m b.1620 N/m…

A: Vibrational Frequency of 18O2 = 1764 cm-1  Reduced Mass Of 18O2 is  μ18O2 = m18O2 * m18O2  m18O2  +…

Q: 40- 30- 20- 10- 3500 3000 2500 2000 1500 1000 Wavenumber (cm-1) -750 1188 -1480 1683 2-3067 -3186…

A: IR spectra is a useful tool to identify the functional groups of unknown compound.

Q: What is the difference between electronic, vibrational, and rotational transitions?

A: The difference between electronic, vibrational, and rotational transitions has to be given below.

Q: A 600 MHz NMR has a signal to noise ratio of 1000 for a proton standard. The 400 MHz NMR has a…

A:

Q: The loudness of a sound is related to its frequency amplitude

A:

Q: What is a spectral bandpass or effective bandwidth?

A: Wavelength is defined as the distance between two consecutive crests or troughs. It is represented…

Q: For a quinine solution (exposed to air) vs that of the similar solution which has been bubbled with…

A: Fluorescence: Many compounds absorb ultraviolet or visible light and undergo electronic transition…