The Ka for HCN is 4.9 x 10-10. What is the value of Kb for CN-?

Q: This is the chemical formula for acetone: (CH,),CO. Calculate the mass percent of carbon in acetone.…

A: The mass percent of an element is given as follows; Given the chemical formula of acetone is…

Q: iii) iv) NH3, HOAc, NaCNBH3 1) NaN3 PPH3, H₂O NH₂

A: Here we have been provided with two reactions. In 1st one we have to find out the reactant and in…

Q: A 0.15 M solution of a weak acid is found to be 1.3% ionized. What is the Ka of this acid?

A:

Q: Now draw your amino acid connected to glycine via an amide (peptide) bond (at pH7). What is the…

A: Amino acids are the naturally occurring species which polymeris to form protein chain.  In the above…

Q: The chemotherapy drug cisplatin is found to break down in the body according to 1st order kinetics.…

A: Break down of cisplatin in the body follows First Order kinetics. The rate constant k for this…

Q: What volume of water (in mL) is required to prepare a 0.400 M solution from 10.0 g. of KF (MW =…

A: Molarity of solution = 0.400 M  mass of KF = 10.0 g  molar mass of KF = 58.10g/mol

Q: How many mol of HCI would have to be added to 0.814 L of a 4.260 M B: in order to obtain a buffer…

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Q: The vapor pressure of pure water at 25oC is 23.8 mmHg. What is the vapor pressure of water above a…

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Q: 10) What is the major product of the following reaction? a) + A NO₂ NO₂ b) NO₂ NO₂ d) NO2

A: This is an example of Diels-Alder reaction. During this reaction: 1. Stereochemistry of dienophile…

Q: Consider the following reaction that has a Kc = 2.4 x 10^-3 at 1000K: N2(g) + 3 H2(g) = 2NH3(g) in a…

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Q: A botanist measures the thickness of a leaf. The thickness is 2.9 mm. What is the thickness in…

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Q: the decomposition of ammonia gas is 2NH3 = N2 + 3H2  If a balloon was filled with 3.5 L of ammonia…

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Q: a. C8H10O; 1H NMR: 8 3.4 ppm (3H, singlet) 8 4.5 ppm (2H, singlet) 87.2 ppm (SH, singlet) b.…

A: This questions based on NMR spectroscopy.  From given data find out structure of organic compounds

Q: 13. Balance the following equation occurring in acidic solution l'(aq) + NO₂ (aq)-1;(s) + NO (g)

A: To balance redox equation in acidic medium we can use add) H^+/H2O in equation.  First find out…

Q: Consider the hypothetical equilibrium system below: A+B+C What is the equilibrium constant of this…

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Q: NH₂ primary amine secondary amine tertiary amine most basic? most nucleophilic?

A: Here we have to identify which one is most nucleophilic and which one is most basic amongst given…

Q: calculate the molarity of a solution made by dissolving 3.4g of NaCl in 500mL of H2O

A: Molarity is the concentration term which is the number of moles of solute dissolved in one liter of…

Q: Argon at a pressure of 1 atm condenses to a liquid at 87.4 K and solidifies at 83.9 K. The vapor…

A: Ideal gas Law can be used to determine the volume of N2 vapors at different temperature and pressure…

Q: 12) Calculate the K., of silver chromate if the chromate concentration was determined to be 6.54 x…

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Q: what type of reaction is fe+h2so4=fe2(so4)3+h2

A: We can determine the type of reaction by observing the changes in the reactant and product sides.

Q: Give the balanced cell equation and determine & for the galvanic cells based on the following…

A: In a galvanic cell, The electrode which has higher reduction potential will act as a cathode and…

Q: How is Cu2O nanoparticle synthesized in the laboratory? Suggest a method and briefly describe it.

A: One common method to synthesize Cu₂O nanoparticles in the laboratory is the chemical reduction…

Q: Ox A calorimeter holds 45 g water at 18.0°C. A sample of hot iron is added to the water. The final…

A: To find the enthalpy change  in the calorimeter that holds 45g of water and the temperature changes…

Q: Calculate the Gibbs energy and equilibrium constant for the chemical reaction at a temperature of…

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Q: Consider a galvanic cell with the following components: A platinum electrode in 0.20 M Fe2+ (aq) and…

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Q: a balloon is inflated to a pressure of 2.55 atm at a temperature of 25 c . What temperature in C is…

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Q: A solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water. The density of the resulting…

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Q: The combustion of solid glucose with oxygen gas produces carbon dioxide gas and water vapor. This…

A: The balanced chemical equation for the combustion of glucose can be written as: C6H12O6(s) + 6O2(g)…

Q: The pKa of formic acid is 3.75. What is the Ka of formic acid? Ka = 10-pka

A:

Q: TEXT ANSWER Question 12 Write the products formed in the following acid-base reaction. NaOH + HCI →…

A: Acid - base reaction - an acid base reaction is also called neutralization reaction that occurs…

Q: How many moles of N₂ are present in a sample that is at 29.9 °C, 24.5 psi, and has a volume of 903.8…

A: Given  Temperature ( T ) = 29.9 ℃  Volume ( V )      =  903.8 mL  Pressure ( P )   =  24.5 psi 1 atm…

Q: Which of the following is the net ionic equation for the reaction of the weak acid HC2H302 with the…

A: The Bronsted-Lowry acid-base theory states that the acid is a substance that gives H+ ions and the…

Q: List all possible values of the angular momentum quantum number / for an atomic electron with…

A: Principal quantum number (n) = 6

Q: How many moles of gas are in a 0.325 L flask at 0.914 atm and 19oC? Group of answer…

A: V= 0.325 LP = 0.914 atmT = 19oC

Q: Calculate the rms speed of CO molecules at 315 K Calculate the rms speed of Cl2 molecules at 315 K…

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Q: The pH of a solution of C₂H₂NH₂ is 9.59 at 25 °C. What is the H concentration in this solution?

A: The question is based on the concept of pH of the solution.  it is defined as a negative logarithm…

Q: 4. The following Diels-Alder reaction product is an intermediate in the synthesis of estrone.…

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Q: 2. The equation AT = Kem is only strictly applicable to very 3. The f.p. lowering (AT) only depends…

A: Answer: Relative lowering of vapor pressure, elevation in boiling point, depression in freezing…

Q: Use the References to access important values if needed for this question. A sample of hydrogen gas…

A: Given  Pressure ( P )        =  1.46 atm  Temperature ( T ) =  298 K  Volume ( V )         =  675 mL…

Q: 17. The following equilibrium system was found to contain 0.040M formaldehyde (CH₂O) at equilibrium.…

A: We have the reaction  CH2O ↔H2 + CO   ΔH>0 This reaction is exothermic.  Equilibrium…

Q: a) b CH₂1 N₂ HSO4 NaOH 1 equiv. H₂O H3PO2

A: benzylic iodide react with a strong nucleophile like NaOH, the reaction will proceed via SN2…

Q: For the reaction NH4Cl(s) ⇌ NH3(g) + HCl(g), the ∆H°rxn = +176 kJ/mol and the ∆G°rxn = +91.2 kJ/mol.…

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Q: Try and propose a synthesis pathway for the production of the following compounds a) to e) from the…

A: For any organic transformation, we must know about the nature of the reactant and the best reagent…

Q: 3. A 0.50 M solution of a diprotic acid with a pKal = 2.72 and pKa2 = 4.47 is titrated with…

A: Concentration of NaOH = 0.1 M Volume of NaOH = 20 mL pKa1 = 2.72 pKa 2 =4.47

Q: Salicylic acid (H2C8H4O2) is a diprotic acid (Ka1 = 1.12 x 10-3 ; Ka2 = 3.91 x 10-6). Provide the…

A: A diprotic acid

Q: The maximum amount of silver iodide that will dissolve in a 0.178 M potassium iodide solution is M.

A: Given

Q: A 25.0 mL solution of HBr is neutralized with 16.6 mL of 0.105 M Sr(OH)₂. What is the concentration…

A: for the HBr solution,  molarity=?  volume=25.0 mL for the Sr(OH)2 solution,  molarity=0.105M…

Q: O2(g) → 20(g). What are the relative values (positive, negative, or zero) of AH, AS, and AG for this…

A: Here,  Oxygen molecule is converted into Oxygen atoms.  Here, energy is required to break the bonds.…

Q: Based on the reduction potential data below for two metals, what is the standard cell potential for…

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Q: The compound you are working with is HBr. This compound is dissolved in water. Your lab partner…

A: Acidity is defined as the ability of a molecule to release protons.  if a compound  easily donate…

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.