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The flask shown here contains 0.649 g of acid and a few drops of phenolphthalein indicator dissolved in water. The buret contains 0.160 M NaOH. The volume of end point titration is 20.5ml. What is the molar mass of the acid (assuming it is diprotic and that the end point corresponds to the second equivalence point)?
consider 1.0 liters of an aqueous solution that contains 0.10 m sulfuric acid to which 0.30 moles of barium nitrate is
a mixture of nitrogen and hydrogen reacts as fully as possible to form a 56 l mixture of ammonia and hydrogen at stp. when this mixture is compressed to 10.0 atm and chilled to 200.0 K, all of the ammonia is liquefied leaving 3.2 L of hydrogen sti..
a certain organic compound was burned producing 1.481 g of co2 and 0.303 g of h2o. the mass of the original sample was
0.113 m aqueous solution of a weak acid, HA, is 2.23% ionized. At what temperature does it freeze? Kf for water = 1.86o C/m.
The spherical r theta phi equation needs to be used but am having difficulty with the integral of the equations.
Explain how do you calculate the photon wavelength (in nm) corresponding to the electron affinity for chlorine
draw the structure of the product you would expect from thereaction of benzaldehyde and acetophenone with base. suggest
Suppose that the atomic mass unit (amu) had been defined as one-twentieth of the average mass of an atom of lithium instead of one-twelfth of the mass of an atom of carbon-12. What would the average atomic mass of calcium be on this new scale
Describe a simple and practical way to make 1.00 L of this buffer solution, assuming a 1.0 M solution of the molecular base is available and that the chloride salt of the conjugate acid is available as a solid
the teaching assistants did this experiment last week. they started with 5.872g piece of copper wire. after drying the
a plutonium-239 atom may emit a photon of light with a wavelength of 24.0 pm when it undergoes nuclear fission. What is the frequency of this radiation?
a) decreasing the volume of a gas b) melting a solid c) chemical reactions that increase the number of moles of gas d) forming mixtures from pure substances e)increasing the temperature of a gas
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