MCQ
Find the molar mass of an element that crystallizes forming unit cell structure having edge length $4 \times 10^{-8} \mathrm{~cm}$ and containing 4 particles. $\left(\mathrm{e}=19.7 \mathrm{~g} \mathrm{~cm}^{-3}\right)$
- A$160 \cdot 5 \mathrm{~g} \mathrm{~mol}^{-1}$
- B$220 \cdot 0 \mathrm{~g} \mathrm{~mol}^{-1}$
- C$140 \cdot 2 \mathrm{~g} \mathrm{~mol}^{-1}$
- ✓$189 \cdot 8 \mathrm{~g} \mathrm{~mol}^{-1}$