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what mass of potassium benzoate is needed to prepare one liter of a 0.135M solution of potassium benzoate?
the structure of a protein by both NMR and X-ray crystallography and they differ in one region. Which is more likely to be the true structure of the protein when dissolved in solution? Why?
How much ice in grams would have to melt to lower the temperature of 358 g of water from 40 degrees to 0 degrees? (Assume that the density of water is 1.0 (g/ml)
This mixture has density of 1.391g/L and occupies a volume four times as that of pure hydrocarbon. Determine the molecular formula of the hydrocarbon.
calculate the minimum concentration of mg 2+ that must be added to .10 M NaF in order to initiate a precipitate of magnesium flouride.
Hemoglobin has a positive charge of +5 and a radius of 3.55 nm in water. How far will the protein travel in one hour in an electrophoresis gel at 25C when a field
The following compounds undergo McLafferty rearrangement in the mass spectrometer. Predict the masses of the resulting charged fragments for each of the following compound.
How much silver iodide, AgI, in grams will dissolve in 1200 ml of pure H2O at 25 degrees Celcius when the system reaches equilibrium
The solution to Chemistry, Are there differences between having electron-donating groups and electron-withdrawing groups
Ammonium nitrate is a common ingredient in chemical fertilizers. Use the reaction shown to calculate the mass of solid ammonium nitrate that must be used to obtain 0.200 L of dinitrogen oxide gas at STP.
it is found that 1.431g of element x ciontains 7.509 *10^21 atoms. calculate the atomic mass of x
Calculate the number of moles of liquid propane that can be stored in the same volume if the density of the liquid is 0.590 {rm{g}}/{{rm{mL}}}.
What is the theoretical percent, by weight, of calcium in Ca(OCl)2
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