Short Answer TypeAn element with density 2.8 g cm−3 forms of the f.c.c. unit cell with edge length 4 X10−8 cm. Calculate the molar mass of the element.
(Given: NA = 6.022 X 1023 mol −1)
Edge length, a = 4 x 10-8 cm
Density, d = 2.8 g cm-3
As the lattice is fcc type, the number of atoms per unit cell, z is 4.
Avogadro's number, NA = 6.022 x 1023 mol-1
Molar mass can be calculated with the help of given relation:
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(ii) What type of stoichiometric defect is shown by NaCl?
OR
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(i) Tetrahedral and octahedral voids
(ii) Crystal lattice and unit cell.
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(i) Predict the order of the reaction.
(ii) What is the slope of the curve?
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