Find the void volume of a $bcc$ unit cell in $cm^3$ if the volume of the unit cell is $1.5 \times 10^{-22} \ cm^3$.
- A$4.8 \times 10^{-23}$
- B$3.6 \times 10^{-23}$
- C$2.4 \times 10^{-23}$
- D$1.2 \times 10^{-23}$
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