Calculate the molar mass of an element having density $5.6 \ g \ cm^{-3}$ that forms a $bcc$ structure. $\left[a^3 \times N_{A}=75 \ cm^3 \ mol^{-1}\right]$
- A$198 \ g \ mol^{-1}$
- B$210 \ g \ mol^{-1}$
- C$118 \ g \ mol^{-1}$
- D$225 \ g \ mol^{-1}$
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$1.$ Density of unit cell $(d) = ........$
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