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How many grams of dry NH4Cl need to be added to 2.50 L of a 0.100 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 9.00? kb for ammonia is 1.8*10^-5.
You have 75.0 mL of a 2.50 M solution of Na2CrO4(aq). You also have 125 mL of a 1.52 M solution of AgNO3(aq). Calculate the concentration of CrO4 2- after the two solutions are mixed together.
Starting with a 5-carbon alcohol, a 6-carbon alcohol, and malonic ester, complete the synthesis and name the product(using the Malonic Ester Synthesis)
What is the concentration of X when the potential is 0.0490 V? Assume that the electrode follows the Nernst equation, the temperature is at 25°C, and that the activity coefficient of X is 1.
A certain first-order reaction has a rate constant of 3.40×10?3s^-1 . How long will it take for the reactant concentration to drop to 1/8 of its initial value
The atomic mass of Potassium 39 is 38.96371 AMU. Calculate the binding energy for a mass of this nuclide using 1.008665 AMU for the mass of the neutron, 1.007276 AMU for the mass of the proton, 0.00054858 AMU for the mass of the electron
How is the rate of disappearance of ozone related to the rate of appearance of oxygen in the following equation: 2 O3 (g) ? 3 O2 (g) (rate expression)
The Solubility of Mg(OH)2 (s) in wataer at a certain temperature is 1.0 x 10^-4 mol/L. Calculate the value of Ksp for Mg(OH)2 (s) at this temperature.
Calculate the ionic strength of a solution that is 0.05 mol/kg in Na3[Fe(CN)6](aq), 0.02 mol/kg NaCl(aq), and 0.03 mol/kg in NaBr(aq).
Diamond and graphite are two crystalline forms of carbon At 1 atm and 25°C, diamond changes to graphite so slowly that the enthalpy change of the process must be obtained indirectly. Determine deltaH(rxn) for
The reaction H2O2 --> H2O + O2 could be catalyzed by either MnO2 or beef liver, which contains the enzyme catalase. In either case, the catalyst
A solution of .601g of the solid in 34.1g of the solvent diphenyl gave a freezing point depression of 1.17 degree celsius. Calculate the molar mass and molecular formula of the solid(k1 for diphenyl is 8.00 degree celsius/m)
When X-rays with ? = 1.937 Å are used, the second-order Bragg reflection from a set of parallel planes in a(n) cesium crystal is observed at an angle
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