Question

Gold has a face centered cubic unit cell and has the density 𝟏𝟗. 𝟑 𝒈 𝒄𝒎−𝟑. Calculate the length along an edge. (𝐴𝑢 = 197 𝑔 𝑚𝑜𝑙−1)

Answer 1

$$\rho=\frac{m}{a^3}\\19.3=\frac{130.85\cdot10^{-23}}{a^3}\\a=4.08\cdot10^{-8}\ cm$$