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Assume that 50.0 milligrams of a radioisotope were produced. Define what mass of this material would stay after 45 minutes if this radioisotope has a half-life of 15 minutes.
A voltaic cell is constructed by immersing a strip of silver metal in a 1.0 M AgNO3 solution and a strip of cadmium metal in a 1.0 Cd(NO3)2 solution. The circuit is completed by a wire and a salt bridge in the usual way.
Briefly explain in terms of structure, basicity, and solubility why Novocain® is usually administered by injection whereas benzocaine is typically used in salves.
during the late 1800s hard rock miners replaced candles with carbide lamps for work in mine shafts. the lamps worked by
Explain what a high Ka value of an acid represents and what a low Ka value represents. State and explain the difference between the endpoint and the equivalence point in a titration
Calculate the pH of Benzoic acid if 0.0458 M is dissolved in water ( Ka = 6.40 x 10^-5) C6H5CO2H + H2O = (H3O+) + C6H5CO2 ^-1
The solubility product of PbBr2 is 8.9x10^-6. Determine the molar solubility in the following. (a) pure water (b) 0.20 M KBr solution (c) 0.15 M Pb(NO3)2 solution
Draw the structural formula for the same. Explain the manner in which the structural formula of polar and non-polar amino acids would vary.
When 33.5 mL of 0.580 M H2SO4 is added to 33.5 mL of 1.16 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate ?H of this reaction
Triacyclglycerol are hydrolyzed by a basic solution. Show the mechanism for the base-induced hydrolysis of tristearate. Focus on just one fatty acid to show cleavage.
Then you precipitate the calcium ion in solution by adding sodium oxalate Na2C2O4. The precipitate is calcium oxalate, CaC2O4. You find that a sample of limestone weighing 128.3 mg gives 140.2 mg of CaC2O4. What is the mass % of calcium in the lim..
Calculate the pH if 0.100 M NaOH is added to 1.00 L of a buffer solution that is 0.400 M HCOOH and 0.100 M HCOONa. (Ka for HCOOH = 1.77 x 10-4)
What are the concentrations of each ion present in the solution formed by mixing together the two solutions described below
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