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Chemistry Questions and Answers February 27, 2020

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A student made a solution by dissolving 0.144g of an unknown in 10.00g of benzene, C6H6, and found the vapor pressure solution to be 94.35mm Hg. The vapor pressure of pure benzene is 95.00mm Hg at the temperature of the experiment. (Show your work and use the factor labor method) a. what is the mole fraction of benzene in the solution? b. how many

A student studying the equilibrium I2(g) 2I (g) at a high temperature puts 0.10 mole I2 in a 1.0 L container. He finds that the total pressure at equilibrium is 40% greater than it was originally. What is Kc for this reaction?

The mechanism for the decomposition of NO2Cl is: By making a steady-state approximation for [Cl], express the rate of appearance of Cl2 in terms of the concentrations of NO2Cl and NO2. By making a steady-state approximation for [Cl], express the rate of appearance of Cl2 in terms of the concentrations of NO2Cl and NO2. By making a steady-state

NO2CI NO2 Cl , (k1) NO2CI Cl NO2 C12, (k2)

The vapor pressure of ethanol is 54.68 mm Hg at 25C. How many grams of estrogen (estradiol), C18H24O2, a nonvolatile, nonelectrolyte (MW = 272.4 g/mol), must be added to 157.2 grams of ethanol to reduce the vapor pressure to 53.06 mm Hg ? ethanol = CH3CH2OH = 46.07 g/mol. g estrogen The common laboratory solvent chloroform is often used to purify

The flask contains 25 mL of an unknown diprotic acid aqueous solution that reacts in a 1:2 stochiometric ratio with NaOH. Titrate the solution with NaOH to determine the concentration of the acid. Perform a titration by setting the concentration of the NaOH solution and adding it to the acid solution using the different Add Base buttons. The

Draw the structure of the quaternary ammonium hydroxide resulting from methylation with three equivalents (or excess) of CH3I and silver oxide treatment of the given amine, give the mechanism of its elimination, and draw the major product(s) of the elimination reaction.
NH 2

NH 2
NH 2

Study the drawing of the combination electrode you will make in this experi ment and answer the following questions. a. What are the components of the reference and of the working electrodes b. What is the function of the attached string How must the string be placed so that it functions properly

Use the Nernst equation to calculate Ag when Cu2 0.012 M and AEcell 0.410 V. 3D