In a face-centered cubic $(FCC)$ unit cell,how many unit cells share an atom located at the face center?

What is the total volume occupied by atoms in a face-centered cubic $(FCC)$ unit cell of a metal?

In a face centred cubic lattice,atom $A$ occupies the corner positions and atom $B$ occupies the face centre positions. If one atom of $B$ is missing from one of the face centred points,the formula of the compound is:

The coordination number of $Cs^+$ in the crystal of $CsCl$ is ......

In a face-centred cubic $(FCC)$ lattice,atoms of $A$ form the corner points and atoms of $B$ form the face-centred points. If two atoms of $A$ are missing from the corner points,the formula of the ionic compound is

An alloy of copper,silver,and gold is found to have copper atoms in an $fcc$ lattice. If silver atoms occupy the edge centers and gold atoms are present at the body center,what is the formula of the alloy?