Which ONE of the following mobile phases would give the SHORTEST retention time of prednisolone using a reverse-phase column? HO. но. HO H. Prednisolone
Q: Discuss the similarities and differences of the following terms in the calibration of a particular…
A: TC or TD abbreviated for “to contain” and “to deliver” respectively. In a ‘TC’ marked pipette, the…
Q: For a first order reaction, a graph of __________ versus __________ is linear.
A: We know that First order reaction rate is given by -d[A]tdt=k×At And at time t = 0 , we have [A]t…
Q: 2. A 1.5 g sample of a mixture of naphthalene (C10H8) and anthracene (C14H10) is dissolved in 20.0g…
A: Given that, Weight of the sample mixture of naphthalene and anthracene = 1.5g Weight of benzene =…
Q: 16. What is the pH of an aqueous solution at 25.0°C that contains 3.98x10-9M hydronium ions H+ ?…
A:
Q: 1. If 30.00 ml of a 0.300 mol/L of a weak acid, CH,CO,H (aq), is titrated with a 0.300 mol/L…
A:
Q: What is the pH of a 0.015 M aqueous solution of barium hydroxide? A) 12.18 B) 12.35 C) 1.82 D)…
A:
Q: Chemistry Prepare the following compound using mechanism of Biginelli's reaction mechanism. NH R…
A:
Q: For the reaction of NO with Br,, the following data was obtained. Use the data below to determine…
A: Detail calculation is shown below
Q: The mathematical equation that linearly relates the concentration of the reactant against time is…
A:
Q: Determine the pH at the equivalence point of a titration between 50.0 mL of 0.157 M (CH3)2NH…
A: ( CH3)2NH ( dimethyl amine is a weak base and HClO4 is a strong acid. At equivalance point moles of…
Q: ce the formula of a compound that has th e number of atoms the same number of ele che same shape as…
A: In AlBr4- ion It has 5 atoms. , and number of valence electrons are 25. It has sp3 Hybridization.…
Q: complete the statement about chemical equilibrium. STATEMENT Chemical equilibrium is in
A: Chemical kinetics is branch of chemistry in which we deal with the speed at which rate of reaction…
Q: 1/3 * w lf you know that the acidity function is 3.6 for a buffer solution consisting of 0.7M formic…
A: Answer: Buffer solution is a type of solution that resists the change in its pH on adding small…
Q: If 0.0068 mol/L solution of Pb(NO,), was mixed with 8.15 x 10 mol/L solution of K PO., would a…
A: Given: Molarity of Pb(NO3)2 = 0.0068 mol/L = 0.0068 M Molarity of K3PO4 = 8.15 x 10-4 mol/L = 8.15…
Q: Selected organic compound: FARNESOL c) llustrate a balanced chemical equation to synthesise…
A:
Q: Calculate the standard enthalpy of formation, AHf, of liquid N2H4. ΔΗ. combNH3 ΔΗe = -71.5 kJ/mol…
A:
Q: A. Calculate the molality, freezing point, and boiling point for each of the following water…
A:
Q: 5. Calculate the pressure exerted by 1.000 mol of HCl (g) confined to a volume of 2.000 L at 100 ° C…
A:
Q: is
A:
Q: 4. Write the reduction half reaction 5. What element is oxidized?
A: Here we have write the reduction half reaction and element which is oxidised in the following given…
Q: Calculate the standard enthalpy for the following reaction at 25°C: C(graphite) + H2O(g) → CO(g) +…
A:
Q: How many unpaired etectaons are there Pn the orbitat am of a neutrral atem of Te (2=52) dignam 4 3)
A:
Q: Which chemical reaction is described by the standard cell notation shown below?…
A:
Q: 10. For the Tollowing, uSE UND a) Write out 6 completely different reactions of 3-pentanone…
A: Here the key functionality is ketone and the carbon atom present in it is very much facile towards…
Q: O As the wavelength increases, photon energy decreases. O Wavenumber is inversely proportional to…
A:
Q: Deduce the formula of a compound that has the same number of atoms the same number of electrons and…
A: Electrons are negatively charged particles present in nucleus of an atom and they revolve around…
Q: A sample of gas from a basement containing radon-222 has an activity of 7 pCi/L, which is above the…
A:
Q: For each of the following statements, answer TRUE or FALSE and explain your answer briefly. If…
A: To “TARE” means to zero out the balance. Below are some general rules about using a digital balance.…
Q: Which statement describes equilibrium in a chemical reaction? A Equilibrium occurs when there are…
A: Equilibrium reactions are those reactions in which there is no change in concentrations of Reactants…
Q: 1. A solution is prepared by dissolving 24.0 g of sucrose in 175 g of water. Calculate the boiling…
A:
Q: Volumeconcentrate
A:
Q: a) Will the following reaction proceed primarily by Sn1 or SN2? Show the product/products. NaOCH3…
A: Secondary alkyl halide with strong base undergo SN2 (retention of product) Secondary alkyl halide…
Q: 21. In an acid-base neutralization reaction the products are? a) an acid and its base B) The…
A: In acid-base reaction, we need to tell the products formed.
Q: Zine oxide ointment APF of zine oxide mixed with 85g of simple ointment, you repuire m ointment with…
A: Given : Composition of 100 gm Zinc oxide APF ointment = 15 gm Zinc oxide + 85 gm simple ointment…
Q: Given the following system: 2CO, (g) 21CO (g) + O, if the Keq = 6.40 x 10° @ 2000°C and initially…
A: To calculate equilibrium concentrations , we would use given initial temperature and draw an ICE…
Q: B. Calculate the molality of a water solution if the freezing point is: 6. -9.3°C 7. -27.9°C 8.…
A:
Q: 1. What are the basic concepts and precautions to be observed in specimen collection for…
A: As per the guideline, since you have asked multiple questions, we have solved the first question for…
Q: Which substance, CH3CH3 or CH3NH2 has the higher boiling point? Explain
A:
Q: What is the mass percentage of O in C3H8O2?
A:
Q: Draw structural formulas for these compounds: a) 4-Bromo-1,2-dichlorobenzene b)…
A:
Q: Use the following reaction to answer questions 6-9: 3H;(g) + N½(g) 27 2 NH;(g) + heat 6. Write the…
A:
Q: A student measured concentrations of potassium ions in the solutions using flame photometry and…
A:
Q: Explain why the reagents are added in the specific sequence described in the experiment.
A: To explain why reagents are added in the specific sequence in an experiment.
Q: In the reaction below, 7.0 mol of NO and 5.0 mol of O2 are reacted together. The reaction generates…
A:
Q: Considering Le Chatelier's Principle and the reaction shown below, how would the following changes…
A: Le Chatelier principle says that equilibrium will shift in such away so as to undo the effect of…
Q: The voltaic cell shown above has two identical zinc electrodes : The solution in half-cell A…
A: For concentration cell E°cell = 0. And Ecell is calculated by using nearst equation Here cell with…
Q: NH2 SH NH, H. H. но C. H,N NH2 PEPTIDE RNGCSN *NH, H. PEPTIDE AHIKP
A: Trypsin cuts at Lys(K) and Arg(R) site starting from C end except if Rn = P. At first case trypsin…
Q: How would you name the compound shown below? Choose the BEST answer. H. H. H H. | | | Н— С—С— с— с…
A:
Q: H. H H. H. H-C С — С—С—ОН H. H Н H. H. エ エ エ エーUーエ エーUーエ エーローエ エーリーエ
A:
Q: Consider the following dissociation reaction of iodine at 1000k: I2(g) 2 I (g) The following data…
A:
Please answer..
Step by step
Solved in 2 steps
- Table 1: Selected phytocomponents identified in the plant extract. Retention time, min Name of Compound 10.767 Benzaldehyde 15.790 Azulene 16.002 1-Piperazinecarboxaldehyde 17.935 Phthalan 20.731 2-methoxy-1,3,4-trimethybenzene 24.028 Methylesterpentanoic acid 26.993 Tetradecamethylcycloheptasiloxane 31.753 Hexadecamethyl Cyclooctasiloxane If GC is combined with MS, what data you will add as the 3rd column in Table 1 above. Fill in that data for each of the select identified phytocomponents.Upon screening with TLC (made of silica gel) chromatography using hexane/chloroform (3:1) as eluting solution, 3 spots were detected corresponding to a (A) polyphenol, a (B) tannin and an (C) alkaloid. Write the letters of the on the spots in the chromatogram shown at the right.19) What species if added will allow the separation of neutral molecules in capillary electrophoresis? a) Polyacrylamide b) polystyrene c) sodium dodecyl sulfate d) didodecyldimethylammonium bromide e) divinylbenzene
- A student analyzed a mixture of amino acids using thin layer chromatography where the stationary phase is a silica-coated plate. For the mobile phase, he used 50% ethyl acetate in hexane. The mixture contained three (3) amino acids whose structures are shown below. OH Hollo HO OH OH OH NH₂ NH₂ NH₂ Threonine Valine Glutamic acid a. Identify spots A, B, and C in the developed TLC plate below based on the structures of the amino acids above (ie. which spot is threonine, valine, glutamic acid?). Hint: determine how the structures of the given amino acids differ A. BO С. b. Threonine can be phosphorylated using an enzyme called protein kinase. Given the same conditions the student used in his analysis, will the phosphorylated threonine have a higher, smaller, or the same Rf value compared to threonine? Which of the following compounds would have the lowest Rf value in a TLC analysis? A. Hexane-2,3-diol B. Benzene C. Diethyl ether D. 1,3,5-cyclohexanetriolIn polarimetry when the lactic acid measured was contaminated with glycerol what happens to the measured optical rotation? WIll it increase, decrease or have no effect?You have been given a mixture of lysine of isoelectric point of 9.74, Histidine of isoelectric point of 7.64 and Cystenie of isoelectric point of 5.02 show how you will separate the mixture into pure forms and describe any instrument that you will use to separate the components in the mixture.
- Please propose a chromatography-based strategy to purify human insulin proteins that have been expressed in bacterial cells.Before combining the oil and water phases when making moisturising lotion, the emulsifiers (Glyceryl stereate and Polysorbate 80) must be dissolved in either the oil or the water phase depending on their solubility properties. Decide in which phase each or both the emulsifiers must be dissolved and What type of emulsion (o/w or w/o) will this formulation form? Give a reason for your answer.WILL HEXANE DISSOLVE fenethylline IN GC-MS?
- Biuret Assay accurately quantify protein concentration within the range of 5-150 mg/mL. JUSTIFY THE STATEMENT.A mixture of seven amino acids (glycine, glutamate, leucine, lysine, alanine, isoleucine, and aspartate) is separated by chromatography. Explain why only six spots show up when the chromatographic plate is coated with ninhydrin and heated.Question 9 The relative peak areas and retention for a mixture of five fatty acids separated by GC is given in the table shown below. Based on this information, which fatty acid has the highest percentage? Fatty Acid Retention time Peak Area 4.176 123314 2 6.004 35669 7.542 78968 9.256 16122 13.196 28074 O A. FA 1 O B. FA 3 O C. FA 4 O D. FA 2 3 4 5