Packing Efficiency 15 Flashcards
1
Q
Atomic packing efficiency =
A
No.of atom × volumetric,e of sphere 4/3pi r3 ÷ a3
a= length
For cubic a=2r =52%
For bcc a= 4r/root3 = 68%
For fcc a= 4r/root 2= 74%
2
Q
Sabse zada bharat unit cell koine sa hai
A
FCC closely packed
3
Q
In FCC …..BOND PARA,ETER = 4.04 S RADIUS ?
A
a= 4r /root 2
R=1.14
4
Q
Formula for calculating density of a crystal
A
Mass of unit cell /volume of unit cell
5
Q
In 1 mole how many particles present
A
6.022×10 ki power 23
6
Q
Molecular mass =
A
Gram of mass / mole
Mean 1 mole ka mass itne gram hai
Ya 6.022x 10 ki power 23 particles KS mass itne grams hai to 1 atom ka mass = grams/ Na
7
Q
Formula of density =
A
No of atom x mass of 1 atom / Naxa3
8
Q
Calculate molecular/molar mass
Density =1.33g/cc
a=500pm
Fcc structure
A
1m = 10 ki power 12
1cm =10 ki power 10 pm
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