Ch.13 - Solids & Modern Materials

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Tro 6th Edition

Ch.13 - Solids & Modern Materials

문제 6

What is the name and formula of the compound commonly used in the manufacture of glass to increase the index of refraction?

문제 27

An X-ray beam with λ = 154 pm incident on the surface of a crystal produced a maximum reflection at an angle of θ = 28.3°. Assuming n = 1, calculate the separation between layers of atoms in the crystal.

문제 29

An X-ray beam of unknown wavelength is diffracted from a NaCl surface. If the interplanar distance in the crystal is 286 pm, and the angle of maximum reflection is found to be 7.23°, what is the wavelength of the X-ray beam? (Assume n = 1.)

문제 31a

Determine the number of atoms per unit cell for each metal.

(a) Polonium

문제 31b

Determine the number of atoms per unit cell for each metal.

(b) Tungsten

문제 31c

Determine the number of atoms per unit cell for each metal.

문제 33

What is the packing efficiency of a body-centered cubic unit cell?

문제 34

What is the packing efficiency of a face-centered cubic unit cell? Please show your work.

문제 35

Platinum crystallizes with the face-centered cubic unit cell. The radius of a platinum atom is 139 pm. Calculate the edge length of the unit cell and the density of platinum in g/cm³.

문제 36

Molybdenum crystallizes with the body-centered unit cell. The radius of a molybdenum atom is 136 pm. Calculate the edge length of the unit cell and the density of molybdenum

문제 39

Rhodium has a density of 12.41 g/cm³ and crystallizes with the face-centered cubic unit cell. Calculate the radius of a rhodium atom.

문제 40

Barium has a density of 3.59 g/cm³ and crystallizes with the body-centered cubic unit cell. Calculate the radius of a barium atom.

문제 41

Plonium crystallizes with a simple cubic structure. It has a density of 9.3 g/cm³, a radius of 167 pm, and a molar mass of 209 g/mol. Use these data to calculate Avogadro's number (the number of atoms in one mole).

문제 42

Palladium crystallizes with a face-centered cubic structure. It has a density of 12.0 g/cm³, a radius of 138 pm, and a molar mass of 106.42 g/mol. Use these data to calculate Avogadro's number.

문제 44a

Identify each solid as molecular, ionic, or atomic. a. Ru(s)

문제 44b

Identify each solid as molecular, ionic, or atomic. b. H2O(s)

문제 44d

Identify each solid as molecular, ionic, or atomic. d. Xe(s)

문제 46

Which solid has the highest melting point? Why? C(s, diamond), Kr(s), NaCl(s), H₂O(s)

문제 47c

Which solid in each pair has the higher melting point and why?

a. TiO₂(s) or HOOH(s)

b. CCl₄(s) or SiCl₄(s)

c. Kr(s) or Xe(s)

문제 47d

Which solid in each pair has the higher melting point and why? d. NaCl(s) or CaO(s)

문제 48d

Which solid in each pair has the higher melting point and why?

a. Fe(s) or CCl₄(s)

b. KCl(s) or HCl(s)

c. Ti(s) or Ne(s)

d. H₂O(s) or H₂S(s)

문제 50

An oxide of rhenium crystallizes with the unit cell shown here (rhenium=gray; oxygen=red). What is the formula of the oxide?

문제 54

Identify the structure of each of the two unit cells shown in Problem 52 as the rock salt structure, zinc blende structure, fluorite structure, antifluorite structure, or none of these.

문제 57a

Classify each of the following as a component of a silicate ceramic, an oxide ceramic, or a nonoxide ceramic. a. B₄C

문제 57b

Classify each of the following as a component of a silicate ceramic, an oxide ceramic, or a nonoxide ceramic. b. Mg₂SiO₄

문제 57c

Classify each of the following as a component of a silicate ceramic, an oxide ceramic, or a nonoxide ceramic. c. MoSi₂

문제 63

Which solid would you expect to have little or no band gap? a. Cu(s) b. Si(s) c. As(s)

문제 6

문제 27

문제 29

문제 31a

문제 31b

문제 31c

문제 33

문제 34

문제 35

문제 36

문제 39

문제 40

문제 41

문제 42

문제 44a

문제 44b

문제 44d

문제 46

문제 47c

문제 47d

문제 48d

문제 50

문제 54

문제 57a

문제 57b

문제 57c

문제 59

문제 61

문제 62

문제 63