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Calculate the value of Avogadro's number...

Calculate the value of Avogadro's number from the folowing data :
Density of NaCl = `2.165"g cm"^(-3)`, Distance between `Na^(+)` and `Cl^(-)` ions in NaCl crystal = 281 pm.

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The correct Answer is:
`6.08xx10^(23)`
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