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In the titration of 100.0 mL of 0.100 M methylamine, CH3NH2 (Kb = 3.7 * 10-4), with 0.250 M HCl, calculate the pH under the following conditions.
(a) after 0.0mL have been added.
(b) after 20.0mL have been added.
How much of 2,4 hexadien-1-ol would you need to react with 98 mg of maleic anhydride in a Diels-Alder Reaction? (Assume a 1:1 molar ratio of maleic anhydride to 2,4 hexadien-1-ol)
The specific heat of liquid bromine is 0.226 J/g-K. How much heat (J) is required to raise the temperature of 10.0 mL of bromine from 25.00C to 27.30C? The density of liquid bromine: 3.12 g/mL
The gas-phase reaction C: RateH3NC = CH3CN has been studied in a closed vessel, and the rate equation was found to be: Rate = -delta [CH3NC]/delta t = k[CH3NC]. Which one of the folowing actions is least likely to cause a change in the rate of the..
Boron nitride, BN, has a graphite-like layered structure in which the layers have eclipsed alignment where the B and N atoms in alternative layers in the direction perpendicular to the layers. Rationalize the difference between this structure and ..
A sample of Au(ClO)3 is contaminated with LiClO. An acidified 0.2000 g of this mixture is treated with excess sodium iodide and subjected to iodometric titration.
when 2.45 g of an unknown weak acid ha with a molar mass of 85.0 gmol is dissolved in 250.0 g of water the freezing
A chemist must dilute 80.5mL of 126mM aqueous sodium thiosulfate solution until the concentration falls to 110.mM . He'll do this by adding distilled water to the solution until it reaches a certain final volume.
Octane ratings are assigned to gasoline mixtures based on their ability to prevent knocking relative to isooctane. Estimate the energy released during the combustion of 1.00 mol of pure isooctane.
at 25 degrees celsius the concentration of n2 in h2o was determined to be 7.2 x 10-6m. compute the partial pressure of
A cell has a standard emf of +0.116 V at 298K. What is the value of the equilibrium constant for the cell reaction if n=1, n=2, and n=3
Draw the three different plates you would expect from obtaining a TLC from ibuprofen on silica gel using (a) toluene, (b) ethyl acetate, and (c) methanol as the eluting solvents
How would you prepare 1.000 L of a 1.000 mole L?1, pH 7.50 Tris-aka, tris(hydroxymethyl)aminomethane-buffer? You have pure Tris?HCl, {(HOCH2)3NH+,Cl?}
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