8. All of the alkali metals adopt the same solid structure-a body-centered cubic unit cell. The...
8. All of the alkali metals adopt the same solid structure-a body-centered cubic unit cell. The molar mass of lithium is 6.94 g/cm. The length of an edge of its unit cell is 3.507 Å. The molar mass of cesium is 132.91 g/cm; its unit cell edge length is 6.147 Å. a. What is the radius for each of these atoms? b. What is the volume of space (in Å) that is unoccupied by atoms (i.e., amount of empty space...
9. Hypothesize why a compound would adopt a body-centered cubic unit cell when it crystallizes versus a face-centered cubic. 10. Calculate the edge length of a simple cubic unit cell composed of polonium atoms. The atomic radius of polonium is 167 pm. 11. Calculate the density in g/cm3 of platinum if the atomic radius is 139 pm and it forms a face- centered unit cell.
3. The a-phase of iron adopts a body-centered cubic unit cell with edge length 286.65 pm. Calculate the density of a-iron in units of kg/L. What would the density of iron be if there was no void space in the lattice? Potentially helpful information: the molar mass of iron is 55.845 g/mol.
Metal x crystallizes in a face-centered cubic (close-packed) structure. The edge length of the unit cell was found by x-ray diffraction to be 383.9 pm. The density of x is 20.95 . Calculate the mass of an x atom, and use Avogadro’s number to calculate the molar weight of Metal X crystallizes in a face-centered cubic (close-packed) structure. The edge length of the unit cell was found by x-ray diffraction to be 383.9 pm. The density of X is 20.95...
Tungsten crystallizes in a body-centered cubic unit cell with an edge length of 3.165 x 10-8 cm. The molar mass of tungsten is 183.84 grams/mole. 1 meter = 1012 picometers (a) What is the atomic radius of tungsten in picometers in this structure? (b) Calculate the density of tungsten i grams/cm3
manganese has a body-centered structure cubic unit cell and has a density of 7.88 g/cm^3. from this information determine the length of the edge of the cubic cell
If the edge of a face-centered cubic unit cell is 4.0 Å, what is the radius of the metal atoms packed in the cell? a. 1.0 Å b. 1.4 Å 2.8 Å d. 5.6 Å e. 8.0 Å i jo
Unit Cell Calculations Name _____________________________ Unit Cells: The Simplest Repeating Unit in a Crystal The structure of solids can be described as if they were three-dimensional analogs of a piece of wallpaper. Wallpaper has a regular repeating design that extends from one edge to the other. Crystals have a similar repeating design, but in this case the design extends in three dimensions from one edge of the solid to the other. We can unambiguously describe a piece of wallpaper by...
Lithium chloride crystallizes in a face-centered cubic structure. The unit cell length is 5.14 × 10-8 cm. The chloride ions are touching each other along the face diagonal of the unit cell. The lithium ions fit into the holes between the chloride ions. What is the density of the lithium chloride? A. 3.78 g/cm3 B. 2.42 g/cm3 C. 1.04 g/cm3 D. 3.32 g/cm3 E. 2.08 g/cm3
(a) Differentiate between Face- Centered Cubic (FCC) and Body-Centered Cubic (BCC) crystal structures. Why FCC metals are more ductile than BCC metals? 5 marks) (ii) show the relationship between the unit cell edge length, a, and the atomic radius, R, for a BCC crystal. Iron has a BCC crystal structure, an atomic radius of 0.124 nm, and atomic weight of 55.85 g/mol. Calculate its theoretical density Given: Avogardo's Number is 6.02 x 105 atoms/mol (5 marks) Figure 1 Determine the...