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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.
Write two second order differential equations which describe the forces on each mass. Do this in the comments of your code. (Hint: Newton's Law F=ma, Hooke's law F=-kx.,F=Force, m=mass, a=acceleration, k=spring constant, x=displacement from equili..
a truck starts from rest and travels with a constant acceleration of 1.5 fts2. after a time t it maintains a constant
a pot of 1kg of liquid water is heated on a mountain top where the atmospheric pressure is 0.8 bar. if the liquid water
a centrifugal pump runs at 1500 rpm and delivers 1500 m3hr of water againt a head of 70m when absorbing 350 kw. the
describe one method for manipulation of microstructure and mechanical properties for each of the following class of
Two aqueous sulfuric acid solutions containing 20.0 wt% H2SO4 (SG = 1.139) and 60.0 wt% H2SO4 (SG = 1.498) are mixed to form a 4.00 molar solution (SG = 1.213). Calculate the mass fraction of sulfuric acid in the product solution.
Immediately before failure, the testing machine records a force (F) of 50N, and a deformation (δ) of 2mm. We need to determine the maximum flexural strength (σ)
five kg of carbon dioxide gas undergoes a process in a well insulated piston-cylinder assembly from 2 bar 280k to 20
Your Company is interested in the Pb-Sn alloy system as a possible solder material. Determine the cooling curve for the 90 Sn-10 Pb alloy.
a well-insulated piston-cylinder assembly is connected by a valve to an air supply line at 8 bar. initially the air
Steam produced at 70 bar and some unknown temp. A small amount of steam is bled off just before entering a turbine and goes through an adiabatic throttling valve to atmospheric pressure. The temp of the steam exiting the throttling valve is 400C.
1.7 pound-mass of water fills a container whose volume is 3.7ftsup3. the pressure in the container is 70 psia. how do
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