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What is the molar solubility of PbI2 in water? For PbI2, Ksp=7.9x10-9. You may assume that the ions do not form ion pairs in solution. Give your answer in moles per litre, accurate to two significant figures.
the mineral greenockite is a yellow sulfide of cadmium that is 78.0% cadmium and 22.o% sulfer. determine the emipirical formula of greenockite.
A 732g sample of water was cooled from 60.0°C to 25.3°C. How much heat was lost? Would this process be considered endothermic or ectodermic if the water is the system
A soln was made by dissolving 5 g of sodium iodide in enough water to make 500mL of soln. What is the expected percent transmittance for this soln?
A solution is prepared by condensing 4.00L of a gas, measured at 27°C and 746mmHg pressure into 58.0g of benzene. Calculate the freezing point of this solution.
A material is found to have a tenth-thickness of 2.3 cm for 1.25-MeV gamma rays. a) what is the linear attenuation coefficient for this material? b) What is the half thickness? c) what is the mean-free-path length for 1.25-MeV photons in this mate..
A 0.9092-g sample of wheat flour was analyzed by the Kjeldahl procedure. The ammonia formed was distilled into 50.00mL of 0.05063 M HCl; a 7.46-mL back-titration with 0.04917 M NaOH was required. Calculate the percentage of protein in the flour.
Adenosine monophosphate (AMP) is a regulatory molecule in metabolic processes such as glycolysis and gluconeogenesis. For example, it stimulates the glycolytic enzyme phosphofructokinase, and therefore ATP production, and it inhibits the gluconeog..
If 110 {rm mg} of fluorine-18 is shipped at 8:00 A.M., how many milligrams of the radioisotope are still active if the sample arrives at the radiology laboratory at 1:30 P.M.
The radioactive decay of radon follows first-order kinetics and has a half-life of 3.823 days. How many grams of radon will remain after 12.00 days if the sample initially had a mass of 455 g?
List possible manipulation errors that might contribute to the following errors in results
The corrosion of iron can be thought of as an electrochemical cell reaction. Calculate the voltage difference between two points of corroding iron differing only in their partial pressure of oxygen: 0.20atm of oxygen at one point and 0.0010atm of ..
A mixture of nitrogen and hydrogen was allowed to come to equilibrium at a given temperature according to 3H2+N2 2NH3. At equilibrium, the mixture contained
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