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An aqueous solution of sodium fluoride is slowly added to a water sample that contains barium ion (0.0340 M) and calcium ion (0.0710 M). The Ksp of barium fluoride is 1.0 x 10^-6. The Ksp of calcium fluoride is 3.9 x 10^-11. What is the remaining concentration of the first ion to precipitate when the second ion begins to precipitate?
Calculate the mass of Nitrogen at room temperature dissolved at room temperature in an 80 L aquarium. Assume a total pressure of 1 atm and .78 mole fraction.
Show your calculations and determine the half-life of Tc-99 (in hours). (b)The delivery of a sample of Tc-99 from the reactor to the nuclear medicine lab of the hospital takes 3h.
The temp of the water and that of the gas are identical at 26°C. How many moles of Helium have been evolved?
At what temperature will a solution of 8.27 g CaCl2 in 45.0 g H2O begin to freeze? Assume complete dissociation
what are some difference or similarity in the type of inhibition caused by heat, acid or base and heavy metal ions on enzyme activity.
What is the hybridization of the nitrogen atom in sulfathiazole? Assuming that the sulfur atom is sp2-hybridized, how many -electrons are there in the sulfathiazole ring?
Could someone please help me with this post lab question fororganic chemistry. Draw the structure of the triglyceride formed from oleic acid,linoleic acid, and stearic acid
The results of the experiment supported the hypothesis of semiconservative replication, which was proposed by Watson and Crick.
This given reaction: 2 O3(g) -→ 3 O2(g) has an empirically determined rate law (with a single unimolecular event). Determine what is the observed rate If k =4.0 × 105s-1, [O2] = 0.2M and [O3] = 0.5 M?
The volume of a 24.0g sample of methane gas is 22.8L at 40.0*C and 4.00atm. What will it's volume be at 68.0*C and 4.00atm.
For the reaction shown below, Kp = 0.116 at 38.6 °C. Find the equilibrium partial pressures of ALL species if at the start of the reaction PCO = 1.17 atm and PCOBr2 = 1.4 atm
The half-life of 137Ce is 30 years. How many grams of 137Ce must be produced now to have a sample containing 32 g of 137Ce 190 years from now?Answer in units of g
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