An element has a body centred cubic structure with a edge length of 444 pm. The density of the element is 7.2 gm/cm3 . How many atoms are present in 404 gm of element ?
3.12 1024
9.24 1024
12.82 1023
6.41 1023
Volume of the unit cell
Density of cubic unit cell -
- wherein
Where,
d = density of crystal
z = no. of effective constituent particles in one unit cell
M = molecular weight
a = edge length of unit cell
No = 6.022*1023
Option 1)
3.12 1024
This is incorrect
Option 2)
9.24 1024
This is incorrect
Option 3)
12.82 1023
This is correct
Option 4)
6.41 1023
This is incorrect
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