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Three beakers contain clear, colorless liquids. One beaker contains pure water, another contains salt water, and another contains sugar water. How can you tell which beaker is which? (No tasting allowed!)
Derive the equation relating x and R (use a graphical method), and then calculate the molar flow rate of air required for a fuel feed rate of 175kmol/h, assuming that CO and H2 are oxidized but N2 is not.
explain why the coupling of the diazonium salt with a phenol or an aromatic amine occurs at the para position.
What are the Kb and pKb of a 1.06 *10^-3 M solution of quinine, a drug used in treating malaria, having a pH of 9.75? I calculated and got: Kb = 2.95*10^-17, and pKb = 16.5.
Calculate the pH after the addition of 0.0 mL, 2.0 mL, 4.0 mL, 6.25 mL, 10.0 mL, 12.0 mL, 12.25 mL, 12.5 mL, 13.0 mL, 14.0 mL, and 15.0 mL of the Ba(OH)2.
Many organic chemists when making a new solid compound often first try ethanol as a recrystallizing solvent. If soluable at room temperature, they simply add water and this often works! Why?
Under certain condition for the reaction A ? B, ?H = 14.2 kJ and ?S = 27 J/K. At what temperature in K is the reaction at equilibrium?
a polyatomic ion is composed of c n and an unknown element x. the skeletal lewis structure for this polyatomic ion is
An unknown metal reacts with oxygen to give the metal oxide, MO2. Identify the metal based on the following information: Mass of Metal: 0.356g
The total volume of seawater is 1.5 1021 L. Assume that seawater contains 3.1 percent sodium chloride by mass and that its density is 1.03 g/mL. Calculate the total mass of sodium chloride in kilograms and in tons. (1 ton = 2000 lb; 1 lb = 453.6 g..
Calculate the diffusion limiting current for the oxidation of an organic compound at an electrode in stagnant solution. Assume 6 electrons are involved in the reaction (n=6). C(org) = 0.01 M, D(org) = 2x10^-5 cm^2/s.
An excited electron in a hydrogen atom relaxes to the n=4 level emitting light with a frequency of 1.141*10^14 Hz. In what principal quantum level did the electron begin?
What are the concentrations of HSO4-, SO42-, and H+ in a 0.255 M KHSO4 solution? (Hint: H2SO4 is a strong acid; Ka for HSO4- = 1.3 10-2.)
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