Question

The pyknometric density of sodium chloride crystal is 2.165 x 103 kg m-3 while its X-ray density is 2.178 x 103 kg m-3. The fraction of the unoccupied sites in sodium chloride crytal is?

Answer 1

heya...


pyknometric density:-

Pyknometric density is the closest approximation to true density calculated from the molecular weight and crystalline lattice of a substance.

First density = 2.165 * 10 ^3

Difference of density = 2178-2165 = 13 kg/m 3

Therefore,

fraction of unoccupied site = 13/2178 = 5.96 * 10 -3


tysm...#gozmit

Answer 2

Hey mate!

Here's your answer!!

First density = 2.165 × 103

Difference of density
= 2178 - 2165
= 13 kg/m³

∴ Fraction of unoccupied site

= 13/2178

= 5.96 × 10^-3

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