Question

EXAMPLE 30. The well known mineral fluorite is
chemically calcium fluoride. It is known that in one unit
cell of this mineral, there are 4 Ca2ions and 8 Fions and
that Ca2ions are arranged in a foc lattice. The Fions
fill at the tetrahedral holes in the foc lattice of Ca2+ ions
The edge of the unit cell is 5.46 x 10-5 cm in length. The
density of the solid is 3.18 g cm. Use this information to
calculate Avogadro number (Molar mass of CaF2 = 78.08).
(C.B.S.E. 2010 Set 1)​

Answer 1

Explanation:

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