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Home  >>  AIMS  >>  Class12  >>  Chemistry  >>  Solid State
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The density of CaO is $3.35 gm/cm^3$. The oxide crystallises in one of the cubic systems with an edge length of 4.80 $A^{\large\circ}$. How many $Ca^{++}$ ions and $O^{–2}$ ions belong to each unit cell, and which type of cubic system is present?

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$Ca^{++}$ions=4,$O^{--}$ions=4,fcc type
Hence (C) is the correct answer.
answered Jun 2, 2014 by sreemathi.v

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