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The volumes of a solution containing 1.10 ppm of Zn2+ shown in the table were pipetted into separatory funnels, each containing 5.00 mL of an unknown zinc solution. Each was extracted with three 5-mL aliquots of CCI4 containing an excess of 8-hydroxyquinoline. The extrats were then diluted to 24.0 mL and their fluorescence measured with a fluorometer. The results were the following.
(a) Construct a working curve from the data.
(b) Calculate a linear least-squares equation for the data.
(c) Calculate the standard deviation of the slope and intercept and the standard deviation about regression.
(d) Calculate the concentration of zinc in the sample.
(e) Calculate a standard deviation for the result in part (d).
a closed rigid tank is filled with water. initially the tank holds 9.9ft3 saturated vapor and .1ft3 saturated liquid
A cantilever bridge is built out from piers at either end and is to be joined in the middle. Discuss with a numerical example the problem of lining up the two halves of the span if the truss on one side of the roadway is in the sun and that on the..
the entropy generation during this process if heat is supplied to the tank from a source at 500°C.Copy and paste your question here...
a thin-walled cylindrical pressure vessel of 250 mm internal diameter and 5 mm thickness is subjected to an internal
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One kmol of CO2 in a piston-cylinder assembly, initially at temperature T and 1 atm, is heated at constant pressure until a final state is attained consisting of an equilibrium mixture of CO2, CO, and O2 in which the amount of CO2 present is 0.422..
A refrigerant is compressed in the compression cylinder of a refrigerator from p1 = 112 psi, V1 = 13.0 in3 to p2 = 424 psi, V2 = 3.0 in3. Determine a value of n such that the data are fit by an equation of the form pV n = constant. Hint: You can take..
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