Lithium metal is a body centred cubic structure its density is 0.53 gram centimetre cube and its molar masses 6.94 g mol-1 calculate the volume of unit cell of lithium
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Given, z=2,d=0.53gcm
−3
Molar mass m=6.94
⇒a
3
=
dN
A
ZM
⇒a
3
=
0.53×6.022×10
23
2×6.94
⇒a
3
=4.38×10
−23
⇒a=0.3516×10
−7
cm≃351.6pm
Hence, edge of unit cell is 351.6pm.
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