(3) Tonic UcLithium metal has a body centred cubic structure.its densi

1.	(3) Tonic UcLithium metal has a body centred cubic structure.its density is 0.53 g cm and its molar mass is6.94 g mot Calculate the edge length of a unitcell of Lithium metal(1) 153.6 pm(2) 351.6 pm(3) 527.4 pm(4) 263.7 pmwhat is the correct option?
Answer» answer (2) 351.6 Explanation: 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.

(3) Tonic UcLithium metal has a body centred cubic structure.its density is 0.53 g cm and its molar mass is6.94 g mot Calculate the edge length of a unitcell of Lithium metal(1) 153.6 pm(2) 351.6 pm(3) 527.4 pm(4) 263.7 pmwhat is the correct option?

Answer»

(2) 351.6

Explanation:

GIVEN, z=2,d=0.53gcm

−3

⇒a

0.53×6.022×10

2×6.94

⇒a

=4.38×10

−23

⇒a=0.3516×10

−7

cm≃351.6pm

Hence, edge of unit cell is 351.6pm.