Question

The substance **calcium** is found to crystallize
in a cubic lattice, with an edge length of **556.0**
pm. If the density of solid **calcium** is
**1.549** g/cm^{3}, how many
**Ca** atoms are there per unit cell?

Your answer should be an integer:______ atoms

Answer #1

Vol of Ca unit cell = (556pm)^{3} =
(5.56A^{o})^{3} = 171.879 X 10^{-24}
cm^{3}

Density of Ca = m/V = 1.549 g/cm^{3}

1cm^{3
}=======
1.549 g

171.879 X 10^{-24} cm^{3} ======= ?

? = 1.549X171.879 = 266.24 X 10^{-24} g

Ca molecular weight = 40.078g/mol (means)

40.078g ======
6.023X 10^{23}

266.24X10^{-24}g ======
?

? = 4atoms

The substance tantalum is found to crystallize in a body
centered cubic unit cell and has a density of 17.01 g/cm3 using
these data. Calculate the atomic radius of Tantalum in
picometers

An unknown metal is found to have a density of 7.8748 g/cm3 and
to crystallize in a body-centered cubic lattice. The edge of the
unit cell is found to be 0.28864 nm . Calculate the atomic mass of
the metal.

They metal crystallizes in a face center cubic lattice. The radius
of the atom is 196 PM and the density of the element is 1.55 g/cm3.
How many atoms are there per unit cell?

An unknown metal is found to have a density of 7.1800 g/cm3 and
to crystallize in a body-centered cubic lattice. The edge of the
unit cell is found to be 0.28864 nm .
Calculate the atomic mass of the metal.
please show all formulas and units!

Nickel crystallizes in a face-centered cubic lattice. If the
density of the metal is 8.908 g/cm3, what is the unit cell edge
length in pm?

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?

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.

The density of solid Fe is 7.87 g/cm3. How many atoms are
present per cubic centimeter of Fe? As a solid, Fe adopts a
body-centered cubic unit cell. How many unit cells are present per
cubic centimeter of Fe? What is the volume of a unit cell of this
metal? What is the edge length of a unit cell of Fe?

Copper crystallizes with a face-centered cubic lattice and has a
density of 8.93 g/cm3.
a.) Calculate the mass of one unit cell of copper (in grams) b.)
Calculate the volume of the copper unit cell (in cm3). c.)
Calculate the edge length of the unit cell (in cm). d.) Calculate
the radius of a copper atom (in pm).

Palladium crystalllizes in a face-centered cubic lattice with an
edge length of 388.8 pm. What is the density of palladium?

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 6 minutes ago

asked 6 minutes ago

asked 6 minutes ago

asked 6 minutes ago

asked 13 minutes ago

asked 20 minutes ago

asked 26 minutes ago

asked 29 minutes ago

asked 32 minutes ago

asked 35 minutes ago

asked 43 minutes ago

asked 45 minutes ago