The molybdenum (42
96Mo) has a BCC cubic elementary cell with a
parameter a=0.315 nm. Find...
The molybdenum (42
96Mo) has a BCC cubic elementary cell with a
parameter a=0.315 nm. Find
the density of the molybdenum (in kg/m3);
the lowest distance between atoms.
A. Determine the linear density for BCC lithium, which has a
lattice parameter of 0.35089 nm, in the [100], [110], and [111]
directions. Which of these directions is close packed?
B. Determine the planar density and packing fraction for BCC
lithium in the (100), (110), and (111) planes. Which, if any, of
these planes is close packed?
C. A diffracted x-ray beam is observed from the (220) planes of
iron at a 2θ angle of 99.1o when x-rays of 0.15418...
Gold has a face-centered cubic arrangement with a unit cell edge
length of 4.08 Å . How many moles of gold fit in a gold
nanoparticle sheet with a length of 57.3 nm , a width of 20.1 nm ,
and a thickness of 10.2 nm ?
Iridium crystallizes in a face-centered cubic unit cell that has
an edge length of 3.811 Å.
(a) Calculate the atomic radius of an iridium atom. (b)
Calculate the density of iridium metal.
A) A metal (FW 295.6 g/mol) crystallizes into a body-centered
cubic unit cell and has a radius of 2.89 Angstrom. What is the
density of this metal in g/cm3?
B) A metal (FW 339.6 g/mol) crystallizes into a face-centered
cubic unit cell and has a radius of 2.84 Angstrom. What is the
density of this metal in g/cm3?
At a certain temperature and pressure an element has the simple
body-centred cubic unit cell, depicted below. The corresponding
density is 8.597 g cm-3 and the atomic radius is 1.428 Å. Calculate
(and enter) the atomic mass for this element (in amu).
A two-dimensional rectangular crystal has a unit cell with sides
a1 = 0.468 nm and a2 = 0.342 nm.
(a) Draw to scale a diagram of the reciprocal lattice. Label the
reciprocal lattice points for indices in the range 0<h<3 and
0<k<3.
(b) Draw the first and second Brillouin zones using the
Wigner-Seitz construction.
A metal (FW 379.9 g/mol) crystallizes into a body-centered cubic
unit cell and has a radius of 2.36 angstrom (1 anstrom = 1x10-10
m). What is the density of this metal in g/cm3?
Chromium forms cubic crystals whose unit cell has an edge length
of 288.5 pm. The density of the metal is 7.20 g/cm3. The atomic
weight of Cr is 51.996 amu.
a) Calculate the number of atoms in a unit cell, assuming all atoms
are at lattice points.
b) What type of cubic lattice does chromium have?
c) Calculate the radius of the Cr atom.
d) Calculate the empty volume of the cell.
Since I have the edge length, I'm pretty...
Find x and
y so that the ordered data set has a mean
of 42 and a median of 35, hence compute the harmonic mean and
geometric mean of the data sample.
17, 22, 26, 29, 34,
x, 42, 67, 70,
y
The lengths, in centimeters, of 18 snakes are given below. Draw
an ordered stem-and-leaf diagram for the
data.
24, 62, 20, 65, 27, 67, 69, 32, 40,
53, 55, 47, 33,...