Qno1: why there is a need of chromatography and chromatography thecniqs. B) when and where we should use normal and reverse phase chromatography

Q: For the reaction 2HBr(g) + Cl₂(g) 2HCI(g) + Br₂(g) AH = -81.1 kJ and AS° = -1.20 J/K At standard…

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Q: The value of AH° for the reaction below is -186 kJ. H2 (g) + Cl2 (g) → 2HCl (g) - The value of AH°f…

A: • The given reaction is,         H2(g) + Cl2(g) → 2HCl(g)   • The values provided in the question…

Q: 3. Draw the most stable chair conformation of (cis)1,4-difluorocyclohexane. 4. State whether these…

A: Given : name of compounds and structure

Q: An order for 0.75 gallons of 0.025% w/v solution of benzethonium chloride is received in the…

A: Given that, an order for 0.75 gallons of 0.025% w/v solution of benzethonium chloride is received in…

Q: Calculate the binding energy (in Joules) of a nuclide 112X48 from the following information: mass of…

A: Mass defect is defined as  the difference between the actual atomic mass and the predicted mass…

Q: (1) What is the complete ground state electron configuration for the potassium atom? (2) What is the…

A: Given : elements Tip : atomic number of potassium is 19 and atomic number of manganese is 25.

Q: Outline a synthetic scheme for the preparation of the target B from the suggested starting material…

A: We have to synthesize a given molecule. Also, we have to draw the structure of the starting material…

Q: Provide a synthetic route for the following transformation.

A: Clemmensen reduction is used only for reducing aldehyde and ketones into respective alkane...

Q: What is the IUPAC name of this compound?

A: we have to determine the IUPAC name of the compound

Q: The reaction quotient (Q) for a system is 70. If Kc = 35, what will happen as equilibrium is…

A: The reaction quotient (Q) for a system is 70. The equilibrium constant of system, Kc = 35

Q: 5. a). b) How many stereocenters does this compound have? b) How many stereoisomers are possible for…

A: Stereocenter: Carbon with 4-different atoms r groups attached to it Carbocation stability:  Methyl…

Q: Predict wether this reaction is product-favored or reactant-favored at room temperature by…

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Q: c) b) 8. OCH 3 OCH 3 Ph. H3O* Br AICI CH3 + 2 HOCH 3 Ph + HBr

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Q: For the reaction 2SO2(g) + O2(g) → 2SO3(g) AG=-137 kJ and AS°= -187.9 J/K at 321 K and 1 atm. This…

A: This question is from Thermodynamics  We have to calculate the enthalpy change for the reaction

Q: An electron microscope focuses electrons through magnetic lenses to observe objects at higher…

A: Given , For any microscope the smallest object that can be observed is half of the wavelength of the…

Q: Eocell for the reaction ZnBr2(aq) Zn(s) + Br2(aq) is 1.8491 V. What voltage would you expect from a…

A: we have to calculate the cell potential, Ecell

Q: What is the ratio of mass of soap obtained to mass of fat used? Is it greater or less than one? why…

A: Given Soap and fat

Q: 1. Calculate the molarity of 0.060 moles NaHCO3 in 2500. mL of solution.…

A: • Thus, the molarity of 0.060 moles of NaHCO3 in 2500. mL of solution is 0.024 M in correct number…

Q: The most abundant isomer following the double bromination of benzene by the reaction a. is which of…

A: -> Aromatic compounds can give electrophilic aromatic substitution reaction and substitute…

Q: Which alkali metal would you predict would require the shortest wavelength of light to eject an…

A: Energy required to eject an electron form a metal surface depends upton its ionization energy.…

Q: The compound KCIO4 decomposes when heated according to the equation below. KCIO4(s) →KCI (s) + 2 0₂…

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Q: Use the References to access Important valdes if needed for this questio11. Use standard reduction…

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Q: ← Question 7 of 29 Draw all elimination products that could be formed in an E1 reaction. Ignore the…

A: -> In E1 reaction mechanism first of all leaving group leave and carbocation formed as…

Q: The reaction below has a Kc value of 88.2. If A and B each have an initial concentration of 0.689 M,…

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Q: What is the free energy change in kJ/mol for the process below at 19.97 °C when the concentration of…

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Q: H₂S(g) + 2 H₂O(1) 3 H₂(g) + SO₂(g) Using the standard thermodynamic data in the tables linked above,…

A: The given balanced chemical reaction is  H2S (g) + 2 H2O (l) →3H2 (g) + SO2 (g)  The equilibrium…

Q: 1) How are the half-cells connected and what is the purpose? 2) Explain what is the composition of…

A: A Galvanic electrochemical cell is typically made up of two half cells and a salt bridge. Each half…

Q: For the reaction to access important values if needed for N₂ (9) + 3H₂(g) → 2NH3 (9) AH = -92.2 kJ…

A: Given -> N2(g) + 3H2(g) --->2NH3(g)  ∆H° = -92.2 KJ = -92200 J (1KJ = 1000 J)  ∆S° = -199 J/K…

Q: You are on a new planet and discover a substance, Z2O that undergoes autoionization just like water…

A: Water self-ionizes as follows: H2O+H2O⇌H3O++OH- Equilibrium constant is expressed as:…

Q: To which category does the following reaction belong? -CH₂CH₂CI+ OH- elimination substitution…

A: We have to tell the type of the reaction.

Q: For the reaction Br2(g) + Cl2(g) 2BrCl(g), at equilibrium, it is found that the concentrations of…

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Q: A molecular compound was analyzed and found to contain 40.00% C, 6.71% H, and the remainder oxygen.…

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Q: There are different types of food coloring available in most grocery stores- one that is…

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Q: 2C₂He (9)+702(g) → 4CO2(g) + 6H₂O(g) AH=-2855.4 kJ and AS = 92.7 J/K The standard free energy change…

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Q: Aqueous sulfuric acid (H₂SO4) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium…

A: Sulfuric acid reacts with sodium hydroxide to form sodium sulfate and water. The equation for the…

Q: g) H3C новон CH3 H2C CH3 ОН LDA -78°C H3C- H3C- Д CrO₂ H₂SO4 H3C H3C NH

A: Given are  reactions of ketone. Reaction e is Baeyer-Villiger reaction in which ketone reacts with…

Q: mercury(II) oxide(s) → mercury (1) + oxygen (g) Volume = L

A: Pressure = 1 atm  Temperature = 25°C

Q: What is the equilibrium concentration of chloroacetic acid, HC₂H₂O₂Cl, in a solution prepared by…

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Q: Compare Electron Ionization (EI-MS) and Electro Spray Ionization (ESI-MS)? Please answer at your own…

A: An electron ionization mass spectrometer(EI-MS) is a machine that analyzes samples by measuring it's…

Q: I need help of drawing the Lewis structure for BeF3-

A: Lewis’s structure: Lewis’s bonding theory is based on the octet rule. The Lewis structure is a…

Q: What must be present in monomers when they react in an addition reaction to create polymers?…

A: To solve this problem we have to know about the formation of polymer .

Q: est Review Active J is how manganese appears in the periodic table. 25 Mn+ Manganese 54.94 1 rk this…

A: Correct answer -->  Chemical symbol of manganese

Q: Identify all symmetry elements and point group of 50 y ²².

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Q: The boiling point of liquid A is 75.5 °C at 1 atm (760.0 torr). Its vapor pressure at 15.5 °C is 185…

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Q: What quantity in moles of precipitate will be formed when 45.1 mL of 0.250 M AgNO₃ is reacted with…

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Q: Which substance would you expect to have the highest boiling point? Xe O Ne О не O Kr O Ar

A: Correct answer - Xe Explanation -->  All the given elements are noble gases listed, xenon has the…

Q: What is the quantity of heat (in kJ) associated with cooling 121.1 g of water from 25.60 °C to ice…

A: we have to calculate the heat associated with cooling of water

Q: Give the intermolecular force most responsible for the high boiling point of 2-propanol…

A: The molecule given is 2-propanol, CH3CH(OH)CH3.

Q: For each molecule shown (1) indicate the most acidic hydrogens. (2) Draw the major resonance…

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Q: An empty pycnometer bottle was found to weigh 28.3892 g. Weight when filled with water is 53.1890 g,…

A: Specific gravity is defined as the ratio of density of the substance to that of density of the…