how would the Rf values change if eluted with hexanes using an alumina TLC plate?

Q: The photopeaks of two isotopes are given in the energy spectra for a GC, below. Making use of the…

A: Given Data:Photopeaks of two isotopes  in the energy spectra for a GC.To determine:Energy resolution…

Q: Given your choice of Flame AA, ICP-AE, XRF, EI-MS, or none of these, and keeping in mind that cost…

A: The function of Flame AA  is to detects the metal present in a sample. The function of ICP-AE is to…

Q: In what order would the following compounds be eluted from an alumina column using n-hexane as the…

A:

Q: c. Would it be possible to separate carvone and limonene using just hexanes as the eluent (never…

A: Structure of carvone polar because of the retone group Structure of limonene   Non-polar

Q: 2. Explain how gel electropherogram techniques help clarify events that occurred 50 years ago. Give…

A: Gel electrophoresis is a method of separation of DNA fragments based on the size of the individual…

Q: р-хylene о-хуlene p-xylene mp 0-xylene mp = -25 degrees C, bp = 144 degrees C, density = 0.880…

A: Answer is  a) gas chromatography

Q: If you have a sample which has an absorbance of 1.17, a molar absorptivity of 1 Mcm1, and a cuvette…

A: The given data contains, Absorbance=1.17path length=1.15 cmMolar absorptivity=1 M-1.cm-1

Q: Qs4. This is a TLC analysis of 3 individual compounds. The plate was run in 20 % ethyl acetate, 80%…

A:

Q: Chemistry 1)Arrange the following in order of increasing Rf in TLC? 3-pentanone, 3-pentanol,…

A: As you post multiple question we are supposed to answer the only one question. Kindly repost…

Q: 3. If you wished to study the molecule below by measuring absorbance, what wavelength should you set…

A: In absorbance study analyte solution absorb the incidents wavelength intensity.

Q: Relative Transmittance 0.8 0.6 0.4 3000 INFRARED SPECTRUM www 2000 Wavenumber (cm-1) 1000

A: 1) From the IR spectrum, the characteristics peaks are observed at near about 3050cm-1, 1600cm-1,…

Q: 6) Which compound would show major fragment ions at both m/z = 73 and m/z = 59? Bubble in your…

A: In the given question we are to tell which compound would show major fragment ions at both m/z = 73…

Q: A line was drawn 1 cm from the bottom of the TLC plate. The distance the dye spot moved on a TLC…

A: Retention factor (Rf) is defined as the ratio of the distance travelled by the compound (dc) to the…

Q: он МСРВА CH;Cl, но HO

A: In step 1, first there is a nucleophilic attack of lone pairs of oxygen resulting into formation…

Q: Question 3: Mass Spectrometer Consider a mass spectrometer with a 200.00 mT magnetic field and an…

A:

Q: Calculate the Rf value for the following post eluted on the TLC plate. 9 cm 8.5 cm 0.69 0.94 0.22…

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Q: Based on the TLC plate shown below, what was the error made? O The eluent used was too polar The…

A: TLC i.e. thin layer chromatography is used to identify the components of reaction mixture, depending…

Q: What is the concentration of an unknown sample if its optical rotation is +28.50 deg mL/dm g. Its…

A:

Q: N-number: A protein has a molecular mass of 400 kDa when measured by size-exclusion dodecyl sulfate…

A: Given information,MW given by size exclusion chromatography = 400 kDaIt is the native protein size.…

Q: 1. Provide a structure consistent with the following data: 3H 2H 3.5 25 ppm 2H 2H 15 Mass Spec…

A: The structure of the  compound is analyzed from the spectral informations we got. The final…

Q: An ethanol solution of 3.5 mg/100 ml of compound Y (150.0 g/mol) in a 1.00 cm quartz cell has an…

A: Note: As per guidelines we can answer the first question.  The molar extinction coefficient is a…

Q: In general, we want to have absorptions less than or equal to 1.  Given that an ethanol solution of…

A: Given that: absorbance - 1 extinction coefficient (ε) = 23,150 length of light =  1.00 cm  To…

Q: Calculate the Rf value of a compound with the data given below (please provide your answer to two…

A: Here we required to find the Rf

Q: This is an output from an HPLC experiment. The column was packed with extremely hydrophobic grains.…

A: HPLC High performance liquid chromatography . This technique is based on the adsorption by which the…

Q: Interpret the IR spectrum.

A: In the IR spectrum, a sharp peak at 1600 cm-1 indicates the presence of aromatic C=C bond. The peak…

Q: An LC separation specifies that the mobile phase be 25% tetrahydrofuran (THF) in water.…

A:

Q: 11. Looking at the structures of the 4 different drugs below, what do they all have in common,…

A: Acetaminophen is a pain reliever and a fever reducer. Aspirin is a salicylate (sa-LIS-il-ATE).…

Q: 1. Use the Rule of 13 as well as the isotopic ratio (M, M+1, etc.) to determine a molecular formula…

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Q: Interpret the IR spectrum and what each peak stand for in other to identify the product. 103 103 102…

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Q: Fill compare a few different developing solvents and examine the effect of the polarity of the…

A: #Q.7: Since hexane is a symmetric hydrocarbon, it is nonpolar.  Ethylacetate is polar due to the…

Q: Match column A with Column B. Given: Samples were spotted on the TLC plate and after performing the…

A: This question is related to Thin Layer Chromatography. Thin-layer chromatography (TLC) is a…

Q: 100 H3C 80 60 40 CH3 H3C 20 H3C H;c+ 0.0- 0.0 15 30 45 60 75 90 m/z Figure 3. Positive ion mass…

A: Mass spectrum is an important spectroscopy method to determine the structure of molecule. It…

Q: This was a fractional distillation lab separating cyclohexane and toluene. I know A in the NMR…

A: The question is based on the concept of organic spectroscopy. we need to identify the signals in the…

Q: 3. With 85 % H2SO, by volume in water being used in the reaction, how many moles of water will be…

A: Since you have asked multiple questions, we will solve one question for you. If you want any…

Q: Inches Centimeters 5 21 ● A B C S Inches Centimeters 2 Starting point ----+ Unknown

A: Here we have to calculate the Rf factor for different known ( A, B , C) species and also for an…

Q: D. Record the data for the four experiments in the following tables. Calculate the absorbance. (A =…

A: Experiment-1: Time (sec) A 45 0.065 60 0.055 90 0.040 120 0.018…

Q: Describe how to prepare adulterated palm oil samples before analysing it with Raman spectrometer.…

A: SOLUTION: Step 1: Palm oil is a bright reddish/orange oil produced from the mesocarp of the fruits…

Q: 4958 METHYL-M-NITROBENZOATE-CARBON 200 180 160 140 120 100 80 60 40 20 ppm 86 9T 8- - 52.7

A: Given compound,

Q: Compare and contrast GC/MS IR spectrophotometry. TLC spectroscopy, and UV/VIS spectrophotometry Make…

A: Analytical spectroscopy:

Q: What is the approximate Rf value of the spot in lane A of the TLC plate below? ● ● -F-- A B

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

Q: Concentrated sulfuric acid, H2SO4, was used to visualize the sugars (cellobiose and glucose), whose…

A:

Q: Calculate the amount of extract and amount of TE^-4 needed to get an aliquot of 1 ng/20 uL for the…

A: To obtain an aliquot of 1 ng/20 μL

Q: What does an IR spectrometer measure?

A: As per bartleby guidelines I answered only first question so please don't mind.Thanks in advance

UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or  ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.