Calculate the number of unit cells in $0.5 \text{ g}$ of a metal if the product of the volume and density of the unit cell is $6.65 \times 10^{-23} \text{ g}$.

  • A
    $6.340 \times 10^{21}$
  • B
    $7.518 \times 10^{21}$
  • C
    $5.625 \times 10^{21}$
  • D
    $8.492 \times 10^{21}$

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