4.34 Gold (Au) forms a substitutional solid solution with silver (Ag). Compute the weight percent of gold that must be added to silver to yield an al- loy that contains 5.5 x 10 Au atoms per cubic centimeter. The densities of pure Au and Ag are 19.32 and 10.49 g/cm', respectively.

O h. 0.74 Silver (Ag) has the FCC crystal structure. The atomic radius is R = 0.144 nm and the atomic mass is M = 107.87 g/mole. What is the density of Silver in g/m? Given: Avogadro's Number NA = 0.6023 x 1024 (atoms/mole) Select one: a. 10.6x106 O b. 10.6×105 O c. 10.6×10 O d. 10.60 O e. 10.6x10 Chromium (Cr) has the Boody-Centered Cubic (BCC) crystal structure. The edge length is a= 0.288 nm. What is the linear density in atoms/nm along direction (111P Select one: 9:12 PM O a. 7.48 O O e 4) A ENG 15-Apr-2021

e. 19.28 Clear my choice Scandium (Sc) has the Face-Centered Cubic (FCC) crystal structure. The edge length is a = 0.452 nm. What is the linear density in atoms/nm along direction [110]? Select one: O a. 5.66 O b. 8.00 O c. 3.128 O d. 4.00 O e. 7.48 Lithium (Li) has the Body-Centered Cubic (BCC) crystal structure shown in the figure below. The radius of the Iis r= 0 152 nm. 11:01 PM

3.45 Determine the Miller indices for the planes O shown in the following unit cell: +z A +y 1 2 +x Note: Both of these planes are displayed in Virtual Materials Science and Engineering (VMSE) (accessed through all digital versions of the text) under Metallic Crystal Structures and Crystallography/ Crystallographic Problem 2: Planes/Unit Cell Planes: Plane A Plane B Each image may be rotated (by click-and-drag), which allows you to obtain a better 3D perspective of the plane's orientation. 2/3

Lead has an FCC crystal lattice and atomic radius of 0.175 nm. Find the volume of the unit cell of lead in m^3. Express answer in exponential notation up to two decimal places using caret ^ to denote the exponents and unit in m^3.

Calculate the theoretical density of NiO, given that it has the rock salt crystal structure. You may want to use the table below. The atomic weights for Ni and O are 58.69 g/mol and 16.00 g/mol, respectively. Ionic Radius (nm) P = i Cation Fe²+ Ni²+ Mg2+ Mn2+ g/cm³ 0.077 0.069 0.072 0.067 Anion 0²- S²- Ionic Radius (nm) 0.140 0.184

1. Calculate the number of iron atoms in a 1000kg of iron.  2. Calculate the volume in a cubic centi meters occupied by one mole of boron.

Compute the composition, in atom percent, of an alloy that contains 45.2 kg copper, 46.3 kg zinc, and 0.95 kg lead?

Iron (Fe) has the Body-Centered Cubic (BCC) crystal structure shown in the figure below. The radius of Fe is r = 0.124 nm. What is the planar density in atoms/nm2 in plane (200)?  Select one: a. 12.19 b. 8.62 c. 24.39 d. 4.31 e. 16.19

5. Calculate theoretical density of Cu (FCC) and Fe (BCC). Compare your results with measured density of Cu and Iron (Density of Cu-8.93 g/cm³, Density of Fe= 7.87 g/cm³). Elaborate on differences between the calculated and measured ones (if any). a. Atomic radius of Cu=1.278 Å, Atomic mass of Cu=63.5 g/mol b. Atomic radius of Fe=1.241 Å, Atomic mass of Fe=55.8 g/mol