CBSE Class 12 Chemistry 2018 Solved Paper

Question : 12 of 26

Marks: +1, -0

An element '

X

' (At. mass

=40 {\g} {\mol}^{-1}

) having f.c.c. structure, has unit cell edge length of

400 {\pm}

. Calculate the density of '

X

' and the number of unit cells in

4 {\g} {\of}^{'} {\X}^{'} . ( {\N}_{ {\A}}=6.022 × 10^{23} {\mol}^{-1})

Solution:

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