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A 6.39-g sample of an ant-control preparation was decomposed by wet ashing with H2SO4 and HNO3. The arsenic in the residue was reduced to the trivalent state with hydrazine. After the excess reducing agent had been removed, the arsenic (III) was oxidized with electrolytically generated I2 in a faintly alkaline medium:
The titration was complete after a constant current of 127.6 mA had been passed for II min and 54 s. Express the results of this analysis in terms of the percentage As2O3 in the original sample.
How can you tell from a root locus if the settling time does not change over a range of gain values? What values of damping is associated when a pair of dominant poles Crosse the imaginary axis?
natural gas is primarily composed of methane ch4 while coal can be modeled as eicosane c20h42. methane has a heat of
a a material that you are working with has a band gap of 4 ev but it is opaque doesnt transmit light because it
Detail of features - Proper proportion of features in each part - Description of Concept Generation Process and design Results
saturated steam at 2 mpa is contained in a piston-cylinder device. the initial volume is 0.25 m3. heat is slowly
liquid waterh2o at 200 kpa and 20oc is heated in a chmaber by mixing it with a steam h20 at 200 kpa and 150oc. the
determine the radius of the crank r and the speed n of a slider crank mechanism used in a shaker table. it is required
a piece of hot metal should be cooled rapidly quenched to 25degc which requires removal of 1000 kj from the metal. the
a 2.5 inch diameter schedule 40 pipe subject to 5000 pounds axial compression and a bending moment of 2500 in lbs.
Consider steady-state conditions for which heat is uniformly generated at a volumetric rate q due to passage of an electric current. Using the energy balance method, derive finite-difference equations for nodes 1 and 13.
A 1m3 rocket propellant chamber is filled with combustion gases at 3000 K and 7 Mpa at the instant combustion ceases. The throat area of the nozzle is 0.1m2. Estimate the time it takes for the chamber pressure to drop to 0.7 MPa. Assume that the inst..
rocket boosts the speed of a spacecraft from 7500 m/s to 10 500 m/s with a thrust of 890 kN. Calculate the rocket power.
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