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The chelate CuA22- exhibits maximum absorption at 480 nm. When the chelating reagent is present I at least a tenfold excess, the absorbance depends only on the analytical concentration of Cu(II) and conforms to Beer's law over a wide range. A solution in which the analytical concentration of Cu2+ is 2.15×10-4 M and that for A2- is 9.00×10-3 M has an absorbance of 0.759 when measured in a 1.00-cm cell at 480 nm. A solution in which the analytical concentrations of Cu2+ amd A2- are 2.15 ×10-4 M and 4.00×10-4 M, respectively, has an absorbance of .654 when measured under the same conditions. Use this information to calculate the formation constant kt for the process
a raindrop of mass 3.36 10-5 kg falls vertically at constant speed under the influence of gravity and air resistance.
Derive eulers equation 1- Derive. From first principles eulers equation from the rate of change of momentum 2- Show by integration how Eulers equation derives Bernoullis equation
air at 100 kpa and 27degc enters an isentropic compressor at a rate of 100 ls and leaves at 1000 kpa. determine the
1. A cylinder of 120-mm diameter at 1000 K is quenched in saturated water at 1 atm. Describe the quenching process and estimate the maximum heat removal rate per unit length during the process.
a simple ideal rankine cycle with water as the working fluid operates between the pressure limits of 3 mpa in the
A closed container filled with hot coffee is in a room whose air and walls are at a fixed tem- perature. Identify all heat transfer processes that contribute to the cooling of the coffee. Comment on features that would contribute to a superior con..
steam at 1 bar enters an adiabatic heat exchanger with a quality of 0.896 and exits as a saturated liquid. the steam is
the landsat-c earth resources satellite has a nearly circular orbit with annbspeccentricity of 0.00132. at perigee the
there is a bracket with a long rail on the top that is connected to a vertical pole with a pin. there is another
a 316 in. thick acrylic testing box with dimensions of 10.0 in. x 10.0 in is covered with an unknown 0.50 in.
A wood beam with cross-sectional dimensions 200 mm × 300 mm is reinforced on its sides by steel plates 12 mm thick (see figure). The moduli of elasticity for the steel and wood are Es= 190 GPa and Ew = 11 GPa, respectively. Also, the corresponding..
a section of a roller-coaster is a horizontal cylindrical helix. the velocity of the cars as they pass point a is 15
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