# Chemistry

The density of solid W is 19.3 g/cm3. How many atoms are present per cubic centimeter of W?

As a solid, W adopts a body-centered cubic unit cell. How many unit cells are present per cubic centimeter of W?

What is the volume of a unit cell of this metal?

What is the edge length of a unit cell of W?

1. 👍
2. 👎
3. 👁
4. ℹ️
5. 🚩
1. In 1 cc of W you have 19.3 grams. There are 6.02E23 atoms in 183.84
# atoms 19.3 g = 19.3/6.02E23 = ?

The volume of a unit cell is v = mass/density.
mass unit cell = 2*183.84/6.02E23 = 6.2E-22 but you need to do that more accurately. (Note: The 2 comes from "there are two atoms per unit cell".)
Density = 19.3 from the problem.
volume = 3.2E-23 cc = volume unit cell.

edge length = V1/3

1. 👍
2. 👎
3. ℹ️
4. 🚩
2. 6.326

1. 👍
2. 👎
3. ℹ️
4. 🚩

## Similar Questions

1. ### geometry

12. Find the volume of the cylinder in terms of pi. The diagrams are not drawn to scale. h=8 in. and r=4 in. ~256 pi in.3 ~128 pi in.3 ***** ~64 pi in.3 ~32 pi in.3 14. What is the volume of the composite space figure to the

2. ### Geometry

20. What is the volume of the sphere? Round the answer to the nearest cubic unit. (1 point) 268 cm3 2,145 cm3 17,157 cm3 536 cm3

3. ### chem

If the density of solid iron is 7.87 g/cm3 , what is the packing efficiency of Fe if it adopts a body‑centered cubic unit cell? The molar mass of Fe is 55.847 g/mol .

4. ### General Chemistry

PLEASE ANSWER VERY SOON I AM STUCK! Crystalline silicon has a cubic structure. The unit cell edge length is 543 pm. The density of the solid is 2.33 g/cm3. Calculate the number of Si atoms in one unit cell.

1. ### Chemistry

Iron crystallizes in a body–centered cubic structure. The volume of one Fe atom is 9.38 x 10–24 cm3, and the density of Fe is 7.874 g/cm3. Find an approximate value for Avogadro’s number.

What characteristic best describes the low entropy associated with solids? A. The atoms in a solid are mostly metals. B. The atoms are held together with strong bonds. C. The atoms are arranged in a rigid structure. D. The solid

3. ### chemistry

Sodium metal adopts a body-centered cubic structure with a density of 0.97g/cm3. A. Use this information and Avogadro's number to estimate the atomic radius of sodium. B. If it didn't react so vigorously, sodium could float on

4. ### Chem

Based on the number of atoms per unit cell and the mass of the atom, the mass of the unit cell can be calculated. The density of the unit cell and the material as a whole can be determined from the mass and the volume of the unit

1. ### Chemistry

1.The density of solid Fe is 7.87 g/cm3. What volume per atom of Fe? 2.As a solid Fe adopts a body centered cubic unit cell. What is the volume of a unit cell of this metal? 3.What is the edge length of a unit cell of Fe?

2. ### Chemistry

What is the density of Li2S in grams per cubic centimeter, if the edge length of the unit cell is 5.88*10^2 pm?

3. ### Chemistry

How many atoms of mercury are present in 3.2 cubic centimeters of liquid mercury? The density of mercury is 13.55 g/cc. Answer in units of atoms.

4. ### science

Calculate the buoyant force in air on a kilogram of gold (whose density is about 19 grams per cubic centimeter). The density of air is 1.3 ✕ 10-3 grams per cubic centimeter. Remember that the buoyant force is equal to the weight