Chemistry

posted by .

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?

Please explain! Thanks!

  • Chemistry -

    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

  • Chemistry -

    6.326

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Inorganic Chemistry

    The atoms in barium metal are arranged in a body centered cubic unit cell. Calculate the radius of a barium atom in A if the density of barium is 3.50g/cm3. The atomic weight of barium is 137.34. The atoms in barium metal are arranged …
  2. CHEM

    Info: The atoms of crystalline solid pack together into a three-dimensional array of many small repeating units called unit cells. The simplest of the unit cells are those that have cubic symmetry, with atoms positioned at the corners …
  3. CHEM****

    Initial info: The atoms of crystalline solid pack together into a three-dimensional array of many small repeating units called unit cells. The simplest of the unit cells are those that have cubic symmetry, with atoms positioned at …
  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 cell …
  5. Chemistry

    Silver crystallizes in a face centered cubic unit cell with an edge length of 0.40836 nm. Calculate the density of silver in grams per cubic centimeter i know the answer is 10.5 g/cm^3 but i keep getting lost in figure it out.
  6. Chemistry

    1.The density of solid Fe is 7.87 g/cm3. What volume per atom of Fe?
  7. chemistry

    I have a unit cube question to which the answer is given that I'm trying to figure out. The question is: If under conditions of high pressure & temperature, the crystalline structure rearranges to form a face-centered cubic unit cell, …
  8. science

    The lanthanide metal europium (Eu) forms a crystalline solid with a cubic unit cell of edge length 3.854 Å. The density of europium is 4.408 g cm-3. The crystal structure of solid europium is a. body-centered cubic b. simple cubic …
  9. CHEM HELP ASAP!

    As a solid, Ag adopts a face-centered cubic unit cell. How many unit cells are present per cubic centimeter of Ag?
  10. Chemistry

    The density of solid Cr is 7.15 g/cm3. How many atoms are present per cubic centimeter of Cr?

More Similar Questions