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In niobium (Nb) metal, the valence orbitals are the 5s, 4d, and 5p orbitals. If the bonding in Nb metal is described used band theory, what fraction of the band would be filled with electrons? Assume that all valence bands (5s, 4d, and 5p) overlap. Show your work and your resulting band diagram.
Determine the molecular weight of a compound given the gas phase data: mass of 11.8 g, temperature of 39.1 C, pressure of 630 torr, volume of 1.31 L.
What is the half-life of a compound if 63 percent of a given sample of the compound decomposes in 72 min? Assume first-order kinetics.
In terms of intermolecular foraces, why is there a relationsship between average boiling points and molecular weights?
For each of the following unbalanced equations, indicate how many moles of the second reactant would be required to react exactly with 0.275 mol of the first reactant. Show all work below.
Choose the answer in which the two atoms are listed in order of increasing ionization energy
Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of a 1.50 mg mosquito moving at a speed
The lid is tightly sealed on a rigid flask containing 3.50 L H2 at 17 °C and 0.913 atm. If the flask is heated to 71 °C, what is the pressure in the flask?
In the early days of the periodic table, the 1870s, both silicon and tin were known elements, but germanium was unknown. Using these trends and the densities of silicon and tin that you just obtained, estimate the density of germanium?
what is the speed of a proton in a linear accelerator has a de Broglie wavelength of 159 rm pm
Calculate the minimum chloride ion concentration needed to initiate precipitation of PbCl2 from a solution that contains 0.01M Pb^2+ (aq).
What is the concentration of chromium ion present in a 0.01976 M solution of potassium hydroxide in contact with a large excess
To prevent tank rupture during deep-space travel, an engineering team is studying the effect of temperature on gases confined to small volumes
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