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A lead (II)sulphide crystals has an NaCl...

A lead (II)sulphide crystals has an NaCl structure .What is its density ?The edge length of the unit cell is 500 pm . `N_(0)=6.023xx10^(23)` ,atomic mass :Pb =207.2,S=32.

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The correct Answer is:
`12.708 g cm^(-3)`
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