$-$Given Values$--$

Atomic Radius $(nm)=0\mathrm{.}139$

$FCC$ Metal $=$ Lead

$BCC$ Metal: $=$ Cesium

Temperature $(C)=1450$

Metal $A=$ Iron

Equilibrium Number of Vacancies $(m^{-3})=1\mathrm{.}00E+23$

Temperature for Metal $A(C)=283$

Metal B $=$ Copper

If the atomic radius of a metal is the value shown above and it has the face$-$centered cubic crystal structure, calculate the volume of its unit cell in $n{m}^3?$ Write your answers in Engineering Notation.

Your Answer $=q,$

What is the atomic packing factor for the BCC crystal structure?

Your Answer $=C$

Find the theoretical density for the FCC Element shown above in $\frac{g}{c}{m}^3.$ Write your answer to the ten thousandths place $(0\mathrm{.}0000)$ :

Your Answer $=q,$

Calculate the atomic radius, in nm $,$ of the BCC Metal above utilizing the density and the atomic weight provided by examination booklet $-$ Write your answer with $4$ significant figures:

Your Answer $=q,$

Calculate the fraction of atom sites that are vacant for copper $(Cu)$ at the temperature provided above. Assume an energy for vacancy formation of $0\mathrm{.}90e\frac{V}{?}$ atom:

Your Answer $=q,$

Repeat the calculation in question $5$ at room temperature $(25C)$ :

Your Answer $=q,$

Calculate the energy $($in $e\frac{V}{?}$ atom$)$ for vacancy formation for the Metal A and the equilibrium number of vacancies at the temperature provided above $-$ Write your answer with $4$ significant figures:

Your Answer $=q,$

Calculate the number of atoms per cubic meter in Metal B $($units atoms $\frac{?}{m^3}).$ Write your answer with $4$ significant figures :

Your Answer $=q,$

What is the composition, in atom percent, of an alloy that contains a$)36$ g Metal A and b$)47$ g Metal B$?$ Composition for Metal A$(\%)$:

Your Answer $=$

What is the composition, in atom percent, of an alloy that contains a$)36$ g Metal A and b$)47$ g Metal B$?$ Composition for Metal B $(\%)$:

Your Answer $=$

What is the composition of Metal A in atom percent, if the alloy consists of $4\mathrm{.}5wt\%MlA$ and $95\mathrm{.}5wt\%$ of Metal B$?$

Your Answer $=$

What is the composition of Metal B in atom percent, if the alloy consists of $4\mathrm{.}5$ wt $\%$ Metal A and $95\mathrm{.}5$ wt $\%$ of Metal B$?$ Your Answer $=$

Your Score $=\frac{0}{100}$

$83\%F$