1.

Lithium has a bcc structure. Its density is 530 "kg m"^(-3) and its atomic mass is 6.94 "g mol"^(-1). Calculate the edge length of the unit cell of lithium metal (N_A = 6.022 xx 10^23 "mol"^(-1))

Answer»

527 pm 
264 pm 
154 pm 
352 pm 

SOLUTION :`a^3= (Z XX M)/(N_A xx d) = (2 xx 6.94)/(6.02 xx 10^(23) xx 0.53)`
a = 352 pm


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