Question

The edge of a unit cell of silver crystalization is 408pm and density of silver is 10.6g/cm^3.

calc grams/unit cell

find number of moles of silver/unit cell

find number of atoms/unit cell

use evidance above to find determine which type of cubic unit cell silver forms (sc, bcc, fcc).

Answer #1

Metallic iron crystallizes in a type of cubic unit cell. The
unit cell edge length is 287 pm. The density of iron is 7.87
g/cm^3. How many iron atoms are there within one unit cell?

We can estimate the physical density of any material based on
the unit cell, the known size of the atoms it encompasses, and
their atomic mass. Since density=mass/volume, for the mass in the
unit cell we simply need to determine the number of atoms per cell
* their mass from the periodic table / Avogadro’s number. For the
volume of the unit cell, we just need to determine the lattice
parameter of the unit cell (a) following the same rules...

Iridium metal crystalizes in a face-centered cubic structure.
The edge length of the unit cell was found by x-ray diffraction to
be 383.9 pm. The density of iridium is 22.42g/cm^3. Calculate the
mass of an iridium atom. Use Avogadro's number to calculate the
atomic mass of iridium.

The crystalline form of silver (Ag) is composed of face-centered
cubic unit cells. If the density of silver is 10.48 g/cm3 at room
temperature, what is the edge length of a unit cell of crystalline
silver? Report your answer in picometers (pm).

Calculate the number of atoms per unit cell in
(a) Aluminum (FCC)
(b) Alpha-iron (BCC)

An element crystallizes in a cubic close pack structure. The
edge of a unit cell is 408 pm and the density of the element is
19.27 g/cm^3. From the atomic mass of the element, the element is
:
(a) Ag (b) Au (c) W (d) P

Silver crystallizes with a face centeredd cubic unit cell. the
radius of silver atom is 0.144 nm. Calculate the density of solid
silver ? Answer: 10.6 g/ml

Gold is a face-centered cubic structure that has a unit cell
edge length of 4.08 Å. There are four gold atoms per unit cell.
How many gold atoms are there in a sphere that is 13 nm in
diameter? Recall that the volume of a sphere is
4/3πr^3.

An element crystallizes in a body-centered cubic lattice. The
edge of the unit cell is 3.37 Å in length, and the density of the
crystal is 7.88 g/cm3 .
Calculate the atomic weight of the element.
Express the atomic weight in grams per mole to three significant
digits.

Calculate the density of ReO3?
The unit cell of rhenium trioxide (ReO3) consists of a cube with
rhenium atoms at the corners and an oxygen atom on each of the 12
edges. The atoms touch along the edge of the unit cell. The radii
of Re and O atoms in ReO3 are 137 and 73pm. Calculate the density
of ReO3
Could you show work?! Thanks so much!

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