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A calorimeter is not a perfect insulator. For a reaction that is endothermic, will the reported (delta)H be too high, too low, or unaffected if the heat exchange with the calorimeter is ignored? Explain.
A chemist titrates 20.00 mL of 0.2000 M HBrO ( Ka= 2.3 x 10^-9) with .1000 M NaOH. What is the pH? A) Before any base is added? B) When [HBrO] = [ BrO-] C) at the equivalence point
captain kirk of the starship enterprise, has been told by his superiors that only a chemist can be trusted with the combination to the safe containing the dilithium crystals that power the ship.
The precipitate SnO2·4H2O was removed by filtration. The resulting filtrate and washings were diluted to a total volume of 250.0 mL. A 15.00 mL aliquot was buffered and titration of the lead, copper, and zinc required 35.78 mL 0.001500 M EDTA.
compare the length of a column of mercury to that of a column of water required to produce a pressure of 1.0 bar. the densities of mercury and water at 0C are 13.459g/cm^3 and .99987g/cm^3
What is the IUPAC name for Fructose. Not the 1,3,4,5,6- Pentahydroxyhex-2-
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
Diethylamine, (C2H5)2NH, is a weak base (pKb=3.16 at 25oC). What is the pH of 0.155 mol/L (C2H5)2NH(aq) at 25oC? Give your answer accurate to two decimal places.
A polarization potential arises from a concentration difference between ions in the neighborhood of the electrode and those in the bulk of the electrolyte solution. Calculate the polarization potential in a copper electro-refining cell given the f..
A company is marketing a photovoltaic cell that it claims has an output of 320 W/m2 when tested at the standard 1000 W/m2 irradiation condition
the second one volume is 60 and pressure 658psia we want to join them togother in one pipline what is the final equilibriume pressure?
A syringe containing 1.64mL of oxygen gas is cooled from 95.9°C to 0.8°C. What is the final volume of oxygen gas?
An enantiomerically pure acid is treated with racemic mixture of an alcohol having one chiral carbon.
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