A certain bivalent metal has a density of 7.239 g/cm3 and a molar mass of 105 g/mol. Calculate (a) the number density of conduction electrons, (b) the Fermi energy, (c) the Fermi speed, and (d) the de Broglie wavelength corresponding to this electron speed.
A certain bivalent metal has a density of 7.239 g/cm3 and a molar mass of 105...
Compute the Fermi energy (EF) and the average electron energy (Em) for silver. (The density of silver is 10.5 g/cm3, and its molar mass is 108 g/mol. Assume each silver atom contributes one free electron to the metal.)
A 2.5 g wire has a density of 15.4 g/cm3 and a resistivity of 1.22 × 10−7 Ω · m . The wire has a resistance of 106 Ω . How long is the wire? Answer in units of m. The wire is made up of atoms with molecular mass 22 g/mol. What is the drift speed of the electrons when there is a voltage drop of 201.4 V across the wire? Assume there is one conduction electron per atom....
An ethanol-water solution is 40.00% ethanol by mass and has a density of 0.9450 (g/cm3) at 25.00°C. The density of pure ethanol is 0.7850 (g/cm3) and the density of pure water is 0.9970(g/cm3) at this temperature. At these conditions, the partial molar volume of ethanol is 55.00 (cm3/mol) and the partial molar volume of water is 17.5 (cm3/mol). a. Calculate the total volume of a 1000.0 g solution assuming both ideal and non-ideal conditions. b. What does the difference between...
Calculate the Fermi energy for beryllium, assuming two free electrons per atom. (The density of beryllium is 1.85 g/cm3, and its molar mass is 9.01 g/mol.) eV
9) An ethanol-water solution is 40.00% ethanol by mass and has a density of 0.9450 (g/cm3) at 25.00°C. The density of pure ethanol is 0.7850 (g/cms) and the density of pure water is 0.9970(g/cms) at this temperature. At these conditions, the partial molar volume of ethanol is 55.00 (cm3/mol) and the partial molar volume of water is 17.5 (cmmol). a. Calculate the total volume of a 1000.0 g solution assuming both ideal and non-ideal conditions. b. What does the difference...
Compute the density in g/cm3 of a piece of metal that has a mass of 0.450 kg and a volume of 52 cm3.
Unknown Atomic Mass (g/mol) Density (g/cm3) Aluminum Copper Iron Lead Tin 26.982 63.546 55.847 207.20 118.69 2.70 8.92 7.86 11.34 7.28 An unknown metal sample has a mass of 24.05 g and a volume of 3.06 mL. Consult the table to identify the unknown and calculate the molar volume (cm3/mole) of the unknown metal sample. Record your answer to three significant figures. cm3/mol mit Answer
An 11.0% (by mass) solution of potassium carbonate (molar mass 138.2 g/mol) has a density of 1.13 g/cm3. Calculate the molarity ofpotassium ions (atomic mass 39.10 g/mol) in the solution.
on 11 of 20 > A certain rifle bullet has a mass of 6.45 g. Calculate the de Broglie wavelength of the bullet traveling at 1721 miles per hour. Consult the table of physical constants as needed.
A certain solid metallic element has a density 7.87 g/cm^3 and a molar mass of 55.85 g/mol. It crystallizes in one of the cubic unit cells with an edge length of 286.7 pm. Calculate the number of atoms per unit cell.