# how to calculate theoretical density of fcc

Mass of unit cell = number of atoms in unit cell × mass of each atom = z × m. Mass of an atom can be given with the help of Avogadro number and molar mass as: => Density of unit cell = $$\frac {mass~ of~ unit~ cell}{volume~ of~ unit ~cell}$$, => Density of unit cell = $$\frac {m}{V}$$ = $$\frac {z~×~m}{a^3}$$ = $$\frac {z~×~M}{a^3~×~N_A}$$. I have a 1993 penny it appears to be half copper half zink is this possible? 2. . The above discusses how to determine r in terms of d in a face-centered unit cell. If the density of the metal is 8.908 g/cm3, what is the unit cell edge length in pm?

The mass of 1 mole of silver atoms is 107.87 grams.

Question: 1. if there is no preferred direction, all elements wud settle into either FCC or HCP (or a ramdom close packing). Calculate the atomic radius of palladium. The most fundamental and lowest volume-consuming repeated form of any solid is a unit cell. Determine its atomic weight. The network is called a lattice as the unit cell repeats itself.