Question

Calculate the molar mass of an element having density $19.2 \text{ g cm}^{-3}$ if it forms fcc structure $\left[ \text{a}^3 \times \text{N}_{\text{A}} = 40 \text{ cm}^3 \text{ mol}^{-1} \right]$}

• A. $192 \text{ g mol}^{-1}$
• B. $186 \text{ g mol}^{-1}$
• C. $210 \text{ g mol}^{-1}$
• D. $280 \text{ g mol}^{-1}$

Hint:

FCC fact: $Z = 4$ always

Answer 1

The Correct Option is A