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Can the solubilities of lead formate Pb(CHO2)2(pKso=6.70, pKa=3.75) and copper iodate Cu(IO3)2(pKso=7.13, pKa=0.79) be made equal by adjusting pH? If so, at what pH value are the solubilities equal? How does this pH value depend on the ionic strength?
Balloons are still used to deploy sensors that monitor meteorological phenomena and the chemistry of the atmosphere. It is possible to investigate some of the technicalities of ballooning by using the perfect gas law
Calculate the lattice energy for LiF(s) given the following; sublimation energy for Li(s) +166KJ/mol, ?Hf for F(g) +77KJ/mol, first ionization energy of Li(g) +520KJ/mol, electron affinity of F(g) -328KJ/mol, enthalpy of formation of LiF(s) -617KJ..
Use the given molar solubilities in pure water to calculate Ksp for the given compound. Pd(SCN)2; molar solubility = 2.22 10-8 M
An FM station broadcasts classical music at 89.1 MHz (megahertz, or 106 Hz). Find the wavelength (in m, nm, and A) of these radio waves. m nm A
Calculate the pH of a 0.20 M H2SO3 solution that has the stepwise dissociation constants Ka1 = 1.5 × 10-2 and Ka2 = 6.3 × 10-8.
conversion of 20 ATP molecules to cAMP per second. (Assume that each G protein activates a single unique adenylyl cyclase.) Calculate the number of moles of cAMP that are produced per second. Enter your answer to at least two significant figures.
Strong base is dissolved in 615 mL of 0.400 M weak acid (Ka = 4.50 × 10-5) to make a buffer with a pH of 3.95. Assume that the volume remains constant when the base is added.
According to the Balmer-Rydberg equation, transitions from n= 5 to m= 2 result in a photons of light that give rise to a spectral line with what color
The following data was recorded. Solution: Relative Fluorescence A (standard oxidized) 62.4 B (standard, blank) 7.0 C (sample, oxidized) 52.0 D( sample, blank) 8.0 Calculate the vitamin B1 content of the pork in terms of micrograms per gram.
In the early days of the periodic table, the 1870s, both silicon and tin were known elements, but germanium was unknown. Using these trends and the densities of silicon and tin that you just obtained, estimate the density of germanium?
The mole fraction of oxygen in air is .210. If the atmospheric pressure is .979 atm, what is the solubility of oxygen in air at 25.0 degrees C?
Some 2-methyl-2-butene may be produced in the reaction as a by-product. Give a mechanism for its production. (The experiment was to react t-pentyl alcohol with HCl.)
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