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Compounds A and B elute from a chromatographic column after 14 and 18 minutes, respectively. The time required for the mobile phase to pass through the column is 5 minutes. Calculate the separation factor for substances A and B.
An aqueous solution has a vapor pressure of 84.0 at 50 . The vapor pressure of pure water at this temperature is 92.6 . What is the concentration of in mass percent?
A mixture containing 0.232 mol He(g), 0.163 mol H2(g), and 0.161 mol N2O(g) is confined in a 22.00 L vessel at a constant temperature. The total pressure is 1.16 atm. Calculate the mole fraction of N2O(g) in the mixture.
Estimate the Vmax and Km of the enzyme catalyzed reaction from both of the plots. Compare your results from the two methods and explain why they are slightly different.
A saturated aqueous solution of lead(II) iodate, Pb(IO3)2, contains 3.1 x 10-5 M Pb+2 at 25°C. Assuming an ideal solution, and assuming no reaction of the ions with water, calculate the Ksp of lead(II) iodate at that temperature.
sketch a graph of potential energy versus dihedral angle about the c-c bond of 12-dichloroethane. show the energy
Determine the degree to which the freezing point of blood and other biological fluids is lowered with the help of glycerol. What is the ideal concentration range of glycerol required to achieve this
Calculate the equilibrium concentration of H3O+ in the solution if the initial concentration of C6H5COOH is 7.0×10?2 .
Determine the freezing point of a solution which contains 0.31 mol of sucrose in 175 g of water. Kf = 1.86°C/m
What is the wavelength of the most energetic photons produced by an X-ray tube using U = 24.3 kV potential difference
Calculate the amount of energy present in the following photons and find the region of electromagnetic spectrum for each.
When the magnesium is not allowed sufficient oxygen, some magnesium nitride, Mg3N2, forms. How does one decompose any magnesium nitride
The molecule AX3, in which A is the central atom, is polar and obeys the octet rule. How many lone pairs of electrons does A have
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