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The Ksp of beryllium hydroxide, Be(OH)2, is 6.92 x 10^-22. Calculate the molar solubility of this compound
You make 10-4 M solutions of NaOH and NaHCO3 and a 10-4.3 M solution of Na2CO3. You use pure distilled water that has been fully degassed.
What is the virial pressure of 0.693 moles of O2S gas at 350K in a 1000 cm3 container, given B = -7 cm3mol1-? atm (Report to 2 significant figures.)
A sample of the Dead Sea Scrolls gives a ^14C decay rate of 731 disintergrations/h. A modern sample gives 920 disintergrations/h. Estimate the age of the Scrolls from these data.
What is the pH of a solution of a strong acide like tintric acid, HNO3, which is 5.6 x 10^-4 M? [HNO3 is a strong acide, so it is completly ionized in aqueous solution
what is the mole fraction and b) what is the molality of this compound in the solution? the molar mass of the unknown compound is 45.0 g/mol
Platinum crystallizes in a face-centered cubic lattice (the Pt atoms are at the lattice points only). If the density of the metal is 22.3 g/cm3, what is the unit cell edge length in pm
Copper(I) ions in aqueous solution react with NH3 according to, Cu+ + 2 NH3 Cu(NH3)2+ Kf = 6.3x10^10 M-2 Calculate the solubility of CuBr (Ksp = 5.3x10^-9) in a solution in which the equilibrium concentration of NH3 is
What is the theoretical yield of hydrazine, in grams, prepared from the reaction of 125.0 mL of 0.500M NH3(aq) with 25.0mL of 1.70M NaOCl (aq)?
Isotopes Decay, Isotopes decay according to first order kinetics with a predictable half life
Consider the titration of 30 mL of .025 M NH3 with .025 M HCl. Calculate the pH after the following volumes of titrant have been added.
The best means of personal protection from radiation for emergency responders is the implementation of three basic principles: time, distance and shielding.
nknown gas effuses in 11.0 min. An equal volume of H2 in the same apparatus under the same conditions effuses in 2.56 min. What is the molar mass of the unknown gas
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