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A 16 ounce specialty coffee drink contains 216 mg caffeine. If all the caffeine is extracted and dissolved in an equal amount of water, what is the pH of the solution? What is the percent ionization?
Consider the reaction: 2SO2(g)+O2(g)?2SO3(g) What changes will occur in the concentration of SO2,O2, and SO3 at equilibrium if we were to: a. increase temperature b. increase pressure c. increase SO2 d. add a catalyst e. add helium at constant pre..
Calculate the number of calories needed to increase the temperature of 50.0 g of copper metal from 21.0 degrees C to 75.0 degrees C. Given, the specific heat of copper is 0.382 cal/g x degrees C.
Propose a structure for an amine of formula C4H9N, which liberates a gas when treated with NaNO2 and HCl. The 13C NMR spectrum is as follows, with attached protons in parentheses
what is the major product formed from the Reaction of (3S)-3-bromo-2,3-dimethylpentane
A titration was performed between 25 mL of 0.100 M NH3 and 0.100 M HCl. Calculate the pH of NH3 solution at the following points during the titration.
Complete the ground-state electron configuration for these ions (using the noble gas abbreviation) and identify the charge. we need to find the electron configuration and the charge for Zinc ion thallium(lll) ion
Beaker contains aq soln of 6.94*10^-3M NiCl_2. beaker contains aq soln of 2.06*10^-5M Na_2CO_3. the two solns are mixed together (no volume change) if NiCO_3 has a Ksp of 1.42*10^-7 what do you expect to see?
Use the reactions below and their equilibrium constants to predict the equilibrium constant for the reaction, 2A(s) 3D(g). 2A(s) 1/2B(g) + C(g) K1 = 0.0334
discribe the points of rutherford's model for the nuclear atom and how he tested this model. based on his expiriments, how did ruthford envision the structure of an atom?
In a simplified and example version of the solar system model (developed by Neils Bohr, a Danish chemist), an electron in the first orbit has an energy of 2 J
A 15.00 mL sample of unknown concentration of sulfuric acid is precititated with excess lead(II) nitrate and a precipitate of lead(II) sulfate is collected.
What mass of NaHCO3 must be added to 1.00 L of 0.10 M Na2CO3 to make a buffer solution whose pH=9.85? pKa2(H2CO3)=10.33
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