Calculate the molar mass of an element having density $$7.8 \mathrm{~g} \mathrm{~cm}^{-3}$$ that forms bcc unit cell. $$\left[\mathrm{a}^3 \cdot \mathrm{N}_{\mathrm{A}}=16.2 \mathrm{~cm}^3 \mathrm{~mol}^{-1}\right]$$
- A$$63.18 \mathrm{~g} \mathrm{~mol}^{-1}$$
- B$$61.23 \mathrm{~g} \mathrm{~mol}^{-1}$$
- C$$59.31 \mathrm{~g} \mathrm{~mol}^{-1}$$
- D$$65.61 \mathrm{~g} \mathrm{~mol}^{-1}$$
✓ Correct answer: A
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