Calculate the number of unit cells in 8.1 g of aluminium if it crystallises in face-centred cubic (fcc) structure. (Atomic mass of Al = 27`g*mol^(-1)`)

(a) Calculate the number of unit cell in 8.1g of aluminium if it crystallises in a fcc structure. (Atomic mass of Al = 27 g*mol^(-1) ) (b) Give reasons: (i) In stoichiometric defects, NaCl exhibits Schottky defect and not Frenkel defect. (ii) Silicon on doping with Phosphorous forms n-type semiconductor. (iii) Ferrimagnetic substances show better magnetism than anti-ferromagnetic substances.

What is the number of unit cells in 6.4g of X (atomic mass = 64) (X crystallises in body centred cubic-lattice)

Calculate the approximate number of unit cells present in 1 g of gold. Given that gold cyrstallises in a face centred cubic lattice (Given atomic mass of gold = 197 u).

What is the total number of atoms per unit cell in a face-centred cubic (fcc) crystal structures ?

Number of tetrahedral voids in a face-centred cubic unit cell is-

(i) What is ferromagnetic substance? (ii) KBr crystallises in face-centred cubic (fcc) crystals. The density and formula mass of KBr crystal are 2.65g*cm^(-3) and 119g*mol^(-1) respectively. Find the distance between K^(+)andBr^(-) ions in KBr crystal. or, (i) Which kind of defect in ionic crystal does not alter the density? (ii) An element X has atomic mass 60g*mol^(-1) and density 6.23g*cm^(-3) . The edge length of its unit cell is 400 pm. Identify the type of the unit cubic cell. Calculate the radius of X atom.

A metal, under different sets of conditions, can crystallise in a face-centred cubic (fcc) structure with a unit cell edge length of 3.5Å and in a body-centered cubic (bcc) structure with a unit cell edge length of 3.0Å . Find the ratio of the densities of fcc and bcc structures.

The density of copper metal is 8.95g*cm^(-3) . If the radius of copper atom is 127.8 pm, is the copper unit cell a simple cube, a body-centred or a face-centred cubic structure? [Given: Atomic mass of copper: 63.54g*mol^(-1), N_(A)=6.022xx10^(23)mol^(-1) ]

What is the number of particles per unit cell in a face-centred cubic lattice-