Q: 1 2 3 TEST TUBE 4 5 Blank Unknown solution Volume 0.52 M Fe₂(SO4)3 1.00 mL 2.00 mL 3.00 mL 4.00 mL…
A:
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: 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: Sally obtains a standard calibration curve for their assigned food dye by plotting absorbance versus…
A: The objective of this question is to determine the concentration of the food dye in the original…
Q: What is not true about mass spectrometry? Only the molecular ion and cationic fragments are…
A: The objective of the question is to choose the statement which is true about mass spectrometry.
Q: Which is the more reliable technique for identifying an unknown compound and why? IR spectrum…
A: Every technique is important to identify a new compound. But the answer of the question is IR…
Q: What kind of “anion exchanger resins” can be used in the columns of an ion chromatography…
A: Ion exchange chromatography is the process of separating the ion based on their interaction with…
Q: ) Identify the calibration method used. b) Calculate the molar concentration of morphine in the…
A: Given: concentration and absorbance when measuring morphine at 285 nm using a 1.00 cm cuvette. To…
Q: What does a refractometer reading of 2 mean when distilling ethanol?
A: Refractometer is an instrument used to measure concentration of aqueous solution.
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: What kind of sample cleanup does solid-phase extraction accomplish in the analysis of caffeine and…
A: Introduction: Extraction is the process of separation of the molecules. There are two types of…
Q: A student weighed out 0.150 g of protein powder and dissolved it in 100 mL of water (Solution 1).…
A: In the solution, the solute concentration is decreased on the mixing of the more amount of the…
Q: True or False. 1. The absorbance of a sample is equal to the negative logarithm of the…
A: Hello dear student, 1) TRUE 2) TRUE 3) TRUE
Q: Column chromatography is also very useful for separating mixtures of organic compounds that are not…
A: Column chromatography is one of the most useful methods for the separation and purification of both…
Q: Chemistry Question
A:
Q: You're in lab and there's a bottle of solvent that has a faded label. You want to dispose of it…
A: IR spectrum is a very good tool to detect which functional group a compound have.
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: True or false and why is false 1 There are 2 major classes of keratins: alpha keratins (found in…
A: 1) True: alpha keratin found in most mammals , claw , hairs nails etc , while beta keratin found in…
Q: 1- While cleaning out a laboratory shelf, you have made a mistake in labeling two bottles of ethanol…
A: Functional groups are the portions in an organic molecule that dictate how the molecule will react.…
Q: Here is the protocol for a UV-Vis spectrophotometer to detect water and chlorine-carbon. 1.Dissolve…
A: To calibrate a spectrophotometer with a standard solution, the solution is placed in a cuvette and…
Q: What structural features of Hydroxypropyl Acrylate (HPA) allow it to be detected by HPLC?
A: HPLC is a technique that has the ability to identify compounds in a sample that can be dissolved in…
Q: Briefly describe how a phase-contrast microscope work and the kind of image that it produces. Give a…
A: Phase-contrast microscopy generates an image by using the different refractive indexes and densities…
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:
Q: 0.1 g amine-containing compound is dissolved in water then diluted to 100 mL. To get the…
A: The question is based on the concept of solution and Lambert beer's law. it states that absorbance…
Q: A student weighed out 0.150 g of protein powder and dissolved it in 100 mL of water (Solution 1).…
A: The problem can be solved in three stages of solution and we must calculate the concentration of…
Q: TLC relies on differences in non-covalent forces. Explain the role of these non-covalent…
A: Rf value means in paper chromatography the ratio of distance travelled by the component to the…
Q: The data in the table are used to create a calibration curve for the determination of RNA from its…
A: Given RNA (ug) Absorbance 0 0.224 10.67 0.512 21.34 0.769 32.01 1.145 42.68 1.465
Q: The data in the table are used to create a calibration curve for the determination of RNA from its…
A: we need to create a calibration curve by plotting Absorbance on y-axis and RNA(μg) on x-axis.
Q: A student weighed out 0.150 g of protein powder and dissolved it in 100 mL of water (Solution 1).…
A: The percentage protein by mass in the original protein powder is to be calculated.
Q: 4 of 15 Abs 2.0 1.5 1.0 0.5 0.25 0.2 0.4 0.6 Concentration (M) With reference to the UV-Vis…
A:
Q: Maria was tasked to determine the concentration of a Fe2(SO4)3 solution. She prepared 5 different…
A: A question based on absorption that is to be accomplished.
Q: A student weighed out 0.150 g of protein powder and dissolved it in 100 mL of water (Solution 1).…
A:
Q: Use a suitable model to explain how separation and identification of a mixture of organic compounds…
A: The mixture indicates the presence of two or more components of a substance in nonspecified molar…
Q: Why is strict implementation of LQMS (Laboratory Quality Management System) or GLP is necessary ?…
A: Please find your solution below : The strict implementation of laboratory quality management system…
What does an IR spectrometer measure? What gives rise to the spectral features?
Why is Tm (melting temperature) positive for some DSC plots and negative for others? What does it tell us about the type of
![](/static/compass_v2/shared-icons/check-mark.png)
Step by step
Solved in 2 steps
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
- TLC relies on differences in non-covalent forces. Explain the role of these non-covalent interactions in determining the Rf value obtained.Which is the more reliable technique for identifying an unknown compound and why? IR spectrum Melting point Thin-layer chromostography (TLC)Sally obtains a standard calibration curve for their assigned food dye by plotting absorbance versus concentration (in M) of known solutions and finds the following slope and intercept: y = 1.646x + 0.026 Note: Copying and/or posting this or other questions without the express written permission from Dr. Burke and the Department of Chemistry & Biochemistry at the University of Delaware is a violation of intellectual property copyright law. Sally finds that her original Kool-aid sample is too concentrated, so they dilute it by transferring 13.00 mL of the original Kool-aid sample into a new container and diluting to a total volume of 37.00 mL. If the absorbance of the dilute Kool-aid sample at the appropriate wavelength for their assigned dye is 0.950, determine the concentration (in M) of the assigned food dye in the original Kool-aid sample. Report your answer with three places after the decimal.
- (h) Describe a chromatographic technique that could be suitable for studying the molecular weight distribution of poly(phenylenevinylene) derivatives that are soluble in organic solvents. Explain the physical basis on which separation could occur and suggest how the polymers could be detected after elution.Calculate the Rf values for each color component and arrange them in terms of decreasing polarity. Explain how did you come up with this sequence.do a IR spectra analysis and draw the molecular structure. Provide a well-explained solution.
- You're in lab and there's a bottle of solvent that has a faded label. You want to dispose of it properly (chemical waste is always labeled by its contents.) You know it is either diethyl ether or n-butanol, but you don't want to measure boiling points to determine which it is so you take an IR spectrum instead. Infrared Spectrum 1.0 0.8 0.6 0.2 0.0 3500 3000 2500 2000 1500 1000 500 Wavenumbers (cm-1) Based on the IR spectrum shown above, what is in the bottle? O n-butanol O diethyl ether Referring to the IR spectrum, describe how you came to that conclusion: Enter your answer here TransmitanceAn analyst was told to determine the amount of glucose in blood using a colorimetric method. The analyst prepared a series of standards containing known amounts of glucose and obtained the results given in the table below by UV/visible spectroscopy. Concentration of Glucose/mmol L-¹ 0.0 2.0 4.0 6.0 8.0 10.0 12.0 Absorbance 0.11 0.25 0.45 0.63 0.87 1.05 1.24 Use the data in the table to plot a graph of absorbance against glucose concentration. a) Is Beer's Law obeyed? b) From the best fit line, calculate the molar absorptivity, &, and its units. c) If a urine sample has absorbance = 0.53, use your graph (not any individual data points) to determine its glucose concentration.What kind of sample cleanup does solid-phase extraction accomplish in the analysis of caffeine and theobromine in chocolate?
- Assignment 2 1- While cleaning out a laboratory shelf, you have made a mistake in labeling two bottles of propanol and propanone. To identify the molecular structure of the contents of the bottle, samples were submitted for analysis using infrared spectroscopy, based on the IR results, draw the molecular structure of the molecule that would correspond to the spectrum for that compound. Justify your answer Spectrum A Spectrum B 100- 0.a 0.6 04 02 4000 3000 2000 1500 1000 50 wavenumber (cmr) 2000 Wavenumber icm-) 3000 1000 ransmittance (%) Transmitance4only do number 4 please
![Organic Chemistry](https://www.bartleby.com/isbn_cover_images/9781305580350/9781305580350_smallCoverImage.gif)
![Organic Chemistry](https://www.bartleby.com/isbn_cover_images/9781305580350/9781305580350_smallCoverImage.gif)