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Grade: 12 

                        
potassium has a bdd structure with nearest neighbour distance of 4.54 arngstrong. its density will be in kgm-3. options:a)4.54 b)808 c)852 d)910 .
3 years ago

Answers : (1)

Arun
24742 Points 
							
For bcc
d = \sqrt3*  a/2
a = 2d /\sqrt3
a = 2*4.54/1.732
= 522 Pico metre
 
Now density = z *M/N*a³
= 2*39/6.023 *10²³ *(522)³ * 10-30
Density = 910 kg /m³
3 years ago
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