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When doing column chromatography using a silica as a solvent....I got two bands when separating blue dextran...but unfortunately cannot remember the colors of those bands
The nitrogen in a 4-tablet sample that weighed a total of 7.50 g was converted to ammonia by Kjeldahl digestion, followed by distillation into 100.0 mL of 0.1750 M HCl. The analysis was completed by titrating the excess acid with 11.37 mL of 0.108..
Calculate the "molar heat of dissolution" (kJ/mol). Recall heat capacity of water is 4.184 J/g degrees celsius.
The angular / azimuthal quantum number equals 6, how many distinct magnetic quantum values are possible? (m sub l)
Estimate the heat released when ethene CH2 CH2 reacts with hydrogen gas to give CH3CH3.
When 18.5 mL of propanoic acid and 19.0 mL of n-propanol are mixed together, calculate the volume of water expected if the yield of the ester were 100%
Determine the number of significant digits in each number and write out the specific significant digits.
one type of sunburn occurs on exposure to UV light of wavelength in the vicinity of 325nm.
degree C and 600. torr contains 50% helium and 50% xenon by mass. what are the partical pressures of individual gases?
Dinitrogen tetraoxide, N2O4, decomposes to nitrogen dioxide in a first-order process. If k=2.5 x 10 to the 3rd s-1 at -5degrees C and k=3.5 x 10 to the 4th s-1 at 25 degrees C, what is the activation energy for the decomposition?
What is the correct order of the following inert electrolytes in their ability to increase the degree of dissociation of acetic acid?
completely evacuated and then filled with an unknown gas to a pressure of 747 mmHg at 22 degree C. If the glass bulb gained 0.103 g in mass, what is the molar mass of the gas?
What mass of sucrose should be combined with 514 g of water to make a solution with an osmotic pressure of 8.85 atm at 295 K? (Assume the density of the solution to be equal to the density of the solvent.)
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