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Calculate the pH of a buffer solution that is 0.423 M in H3BO3 and 0.199 M in NaH2BO3. The Ka of H3BO3 is 5.8e-10. a) The pH of this solution is 8.9. b) The pH of this solution is 9.6. c) The pH of this solution is 0.7. d) The pH of this solution is 0.3. e) The pH of this solution is 9.2.
Calculate the amount of heat required to completely sublime 68.0 g of solid dry ice CO_2 at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kj/mol.
Write a balanced net ionic equation for the neutralization of equal molar amounts of nitric acid and methyl amine (CH3NH2). Indicate whether the pH after neutralization is greater than, equal to, or less than 7.
The required ionic concentrations are Na+=2.45M; K+=.0086M; Mg2+ =.0517M; Ca2+=.0109M, HCO3-=.0025M, CL-=2.48M; SO4 2-=.0486M
Determine the pH of each of the following solutions. (a) 0.382 M hypochlorous acid (weak acid with Ka = 3e-08). (b) 0.900 M hypoiodous acid (weak acid with Ka = 2.3e-11). (c) 0.597 M pyridine (weak base with Kb = 1.7e-09).
Use the Heisenberg uncertainty principle to calculate the uncertainty (in meters) in the position of a honeybee weighing 0.65g and traveling at a velocity of 0.90m/s
Calculate the partition coefficient of caffeine between water and each of the other three solvents. Which of these three organic solvents would be the best choice for extracting caffeine from an aqueous solution?
The metal hydride LiH has a density of 0.77 g/cm3 . The edge of the unit cell is 4.086 . If it is assumed that the H ions define the lattice points, does the compound have a face-centered cubic or a simple cubic unit cell?
what is the equation for ninhydrin test of egg white?
antacids which contain CaCO3 react with stomach acid to the equation . it gives the eq but I cant type it. what is the mass of stomach acid that reacts with 1.00 grams CaCO3 ?
If the ionization constant of water, Kw, at 40°C is 2.92 x 10-14, then what is the hydronium ion concentration and pH for an acidic solution
Salt in crude oil must be removed before the oil undergoes processing in a refinery. The crude oil is fed to a washing unit where freshwater fed to the unit mixes with the oil and dissolves a portion of the salt contained in the oil
A biological sample was submitted to you lab for a nickel assay. Assume you are assaying a 2.06 g tissue sample for the presence or absence of nickel at the 0.1ppb (m/m) level
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