Complete Question
The complete question is shown on the first uploaded image
Answer:
The density is [tex]\rho = 8.21479 g/cm^3[/tex]
Explanation:
From the question we are told that
the lattice constant is [tex]a = 0.295 nm = 0.295*10^{-9} = 0.295*10^{-7} cm[/tex]
The density of Copper ([tex]\beta[/tex]) is mathematically represented as
[tex]\rho = \frac{ZM}{a^3N_A}[/tex]
Where Z is the number of units in a unit cell and for BCC crystals Z =2
M is the molar mass of copper which same for Copper with a value of
[tex]M = 63.5 g/mol[/tex]
[tex]N_A[/tex] is the Avogadro's constant with a value of [tex]N_A = 6.022*10^{23}[/tex]
Substituting values
[tex]\rho = \frac{2 *63.5}{(0.295*10^{-7})^3 * (6.022*10^{23})}[/tex]
[tex]\rho = 8.21479 g/cm^3[/tex]
