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Measurements on sodium have given the following data resistivity 4.7 * 10^-8 ohm m, Hall coefficient -2.5 * 10-10 m3 C-1, critical wavelength of transparency 210nmm and density 971 kgm-3.Compute:
1) Explain the density of electrons
2) Explain the mobility
3) Explain the effective mass
4) Define the collision time
5) Define the number of electrons per atom available for conduction.
Electric conduction in sodium is caused by electrons. The number of atoms in a kg mole is 6.02*1026 as well as the atomic weight of sodium is 23.
Calcium nitrate will react with ammonium chloride at slightlyelevated temperatures, as represented in the equation- Ca(NO3)2(s) +2NH4Cl(s) 2N2O(g) +CaCl2(s) + 4H2O(g)
The other flask is filled with Ar and has a volume of 1.85 L and a pressure of 115 torr. If the valve is open and the gasses mix and assuming that the temperature is constant, what is the final total pressure
Using a phosphorus 12.39 g sample that reacts with 42.54 grams of chlorine to produce only phosphorus Trichloride (PCl3). If it is the only product, determine what mass of PCl3 is formed?
A 0.233 g sample of an unknown monoprotic acid was titrated with 0.105 M KOH and the resulting titration curve is shown below. It took 35 mL to reach the equivalence point. What is the molar mass of the acid
In a voltaic cell containing two compartments one with a strip of iron Fe and with an Fe3+ solution as well as one with a strip of Aluminum, Al3+ in contact with an Al3 solution, the
Explain the half-life of tritium (hydrogen-3) is 12.3 yr. If 61.6 mg of tritium is out from a nuclear power plant during the course of an accident, explain what mass of this nuclide will remain after 12.3 yr
an ethanol-water mixture is to be flash distilled at 1 atm. if the feed is 25 mole % ethanol, what are the liquid and vapor compositions if
calculate the ph of the final solutiona solution is made by dissolving 25.6 g of naoh in approximately 450 ml of
in new york you had a balloon inflated with helium he and you measured its temperature which was 89.6 degree f and its
Europium crystallizes in a body-centered cubic lattice (the Eu atoms occupy only the lattice points).The density of Eu is 5.26 g/cm3. Calculate the unit cell edge length in pm.
The density of air under ordinary conditions at 25 C is 1.19g/L. How many kilograms of air are in a room that measures 11.0ft x 11.0ft and has an 10.0ft ceiling. 1 in = 2.54 cm (exactly); 1L= 10^3 cm^3.
Propose a reasonable synthetic strategy for the synthesis of trans-6-methyl-3-heptene from 4-methyl-1-pentyne.
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