What is the %composition of the Vitamin A peak in the sample? O 7.867% 77.73% O 78.43% O 72.74%

Q: In a reverse phase chromatography setup, which of the following compounds will have the HIGHEST…

A: Ans : Toluene  (Toluene is non polar compound. Therefore elutes last in the reverse phase…

Q: How much energy is required to raise the temperature of 10.6 grams of solid gold from 23.4 °C to…

A: Mass of solid gold = 10.6 grams  Initial temperature = 23.4 °C  Final temperature = 37.3 °C  Energy…

Q: 12. Calculate the heat of formation for the following reactions from the standard enthalpies of…

A: (a) 2H2(g) + O2(g) ----> 2H2O(l)  The enthalpies of formation for different Molecules/substances…

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A: In the given question, functions of several units of a standard hplc system are clearly discussed.

Q: Which of the following factors DOES NOT affect retention time of a sample undergoing normal phase…

A:

Q: Select the correct name for FeO Group of answer choices F (II) O Iron (III) Oxide F (III) O Iron…

A: Which one of the following is correct

Q: What type of aromatic compound is pyridine?  a. Heterocyclic aromatic compound b. Benzenoid…

A:

Q: Which element will have five electrons in its Lewis symbol? O carbon O sulfur O phosphorus O boron

A: Lewis symbol: Lewis symbol diagram is constructed by Putting dots around the element these dot…

Q: decreases or remain the same - Heating a liquid from 20⁰C to 50⁰C - One mole of water is vaporized…

A: Entropy iis degree of randomness or disorderness in system Entropy order Solids < liquids <…

Q: Alkenes and alkynes behave like . and thus attract, A nucleophiles; electrophiles B nucleophiles;…

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Q: The index of Hydrogen deficiency indicates the degree of unsatuiation of the molecule which help in…

A:

Q: Calculate the pH of a carbonate buffer system that contains 0.0065 M HCO, and 0.0084 M CO,. The K,…

A: Given,  Concentration of weak acid, HCO3- = [HCO3-] = 0.0065 M  Concentration of conjugate base,…

Q: Which solution has the greatest buffer capacity? Which solution can react with the largest amount…

A: Buffer solution: The solution that resists the change in pH is known as a buffer solution. The…

Q: In the laboratory a student finds that it takes 49.2 Joules to increase the temperature of 14.8…

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Q: 3- How many cycles of the B-oxidation spiral will occur for a fourteen-carbon fatty acyl-CoA with…

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Q: Predict whether AS for each reaction would be greater than zero, less than zero, or too close to…

A: Predict whether ∆S for each of the reaction--

Q: The electron of a hydrogen atom requires 1.633*10 18 J to be excited from n = 1 Bohr energy level to…

A:

Q: What is the %composition of the Vitamin E peak in the sample?

A: In a chromatogram, the area under any peak represents the concentration of the compound the peak…

Q: 1. The flame-ionization detector is used in gas chromatography because the eluates cannot be…

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

Q: What is the sign for each of the following? (Change in) a. S, H, G for the evaporation of a…

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Q: Draw the major organic product of the indicated reaction conditions. Be sure to clearly depict the…

A: In given reactant We have, amide function and alkyne function. And given reagent is lindlar…

Q: All chromatographic techniques can be used as separation methods.  True  False

A: True : A mixture of compounds can be seperated using column chramatography. Benzoic acid and phenol…

Q: What is the H3O* | and the pH of a benzoic acid-benzoate buffer that consists of 0.13 M C6H5COOH and…

A: Given: Concentration of C6H5COOH = 0.13 M Concentration of C6H5COONa = 0.30 M Ka of C6H5COOH =…

Q: 50 cm3 of 0.05 M weak acid solution is titrated with 0.1 M NaOH solution. The measured pH values are…

A: Hii there, As there are multiple question posted. we are answering first question. If you need…

Q: Write the quotient, Ac , and the equilibrium constant ke, reaction for each of the following…

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Q: 1 SIO2 Si 2 CaCl2 Са CI MnO2 Mn 4 Feo Fe 5 Fe2O3 Fe 6 H2O2 H 7 Сао Са 8 H2S S CIF3 CI F 10 NH4 H

A:

Q: Which of the following reactions of benzene requires a Lewis acid?   a Bromination   b FC…

A: Given statement is :  Which of the following reactions of benzene requires a Lewis acid?   Options…

Q: ТОТE: W. CQUATION! The products are sodium ni- rate, carbon dioxide and water. What volume of 0.107…

A: Molarity of sodium carbonate (M1) = 0.107M Molarity of HNO3(M2) = 0.162 M Volume of HNO3 (V2) =…

Q: Calculate the pH of a solution after 47.0 mL of 0.500 M NaOH is titrated with 53.0 mL of 0.250 M of…

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Q: Which of the following aromatic compound has a hydroxy substitution?   a Aniline   b Cresol   c…

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Q: Ka for formic acid (HCO2H) is 1.8 × 10^-4 . What is Kb for the formate ion (HCO2−)?

A: Answer: HCOOH (formic acid) is the weak organic acid and HCOO- (formate ion) is its conjugate base.

Q: Use your solubility table in the back of the lab manual to complete the following tables. Sr2+ Fe3+…

A: We prepeared chart on the basis of water solublity and by the help of solublity chart. The prepeard…

Q: The concentration of CO- in a saturated solution of CuCO, is 1.60x10- mol/L at a certain…

A: * Solubility product is the product of molar concentrations of ion present in solution, when ion…

Q: A diprotic acid, H, A, has acid dissociation constants of K = 2.32 x 10-4 and K2 = 5.84 x 10-12.…

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Q: Which of the following is the major product of the following reaction? HBr ... (the major product is…

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Q: Which of the following reaction is a spontaneous rearrangement of enol hydration products into a…

A: Reaction which involves simple proton transfer in an intramolecular fashion is called a tautomerism.…

Q: TRUE or FALSE. When phenol undergoes an FC alkylation with methyl chloride and aluminum chloride,…

A: We have to predict whether given Statement is correct or not.

Q: Show work.

A:

Q: Ksp for Fe(OH)3  (Fe(OH)3(s) ⇌ Fe3+(aq) + 3OH-(aq)) is 4.0 × 10-38. In the presence of 0.01 M NaOH,…

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Q: First ionization energy of magnesium is greater than the first ionization energy of aluminum.…

A: Ionization energy is the energy needed to remove the outermost electron from its outermost shell. Or…

Q: What is the major driving force in chromatographic separation? difference in affinity with a…

A: Chromatography has been defined  primarily a separation process which is used for the separation of…

Q: CHEMWORK Choose the statements that are correct. (Select all that apply.) In a galvanic cell the…

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Q: Say an alkene reacted with a peroxyacid like mCPBA, then hydrated after. Take note of the product at…

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Q: What is the concentration of co3²- required (molarity) in a solution that is 0.0014 M in Sr2* in…

A: First write dissociation equation of SrCO3 and use given Ksp and concentration of Sr2+ .

Q: Balance the equation for a half-reaction that occurs in acidic solution. Use e as the symbol for an…

A: A redox reaction is balanced by balancing the mass and charge. In an acidic medium, the charge of…

Q: Which of the following combinations will add up to 5 IHD? A Two double bonds and two rings B One…

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Q: Give a clear handwritten answer....

A: Here we have to synthesise the following given compound from starting material benzamide.

Q: moles of gas are present in the sample of gas occupies that 4.32 L -18°C? (Include your formula used…

A: Gas laws says, PV = nRT

Q: How many electrons can the third principal quantum level hold? [x] Explain how you got the answer in…

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.