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FOLLOW UP PROBLEMS
6. Calculate the density of the bec lattice if its edge length
is 409 pm. Its molar mass is 216.3 g moll and
Avogadro number is 6.02 x 103 mol-
Ans. 10.5 g cm
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Answer:
We know that,
Density=Rank×Molar masss/Volume×Avagrado's no.
=2×216.3/(409×10^-10)^3×6.02×10^23
=432.6/41.187
=10.5gm/cm
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