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JEE MAIN 2019
11-01-2019 S1
Question
A solid having density of $9 \times 10^3 \mathrm{~kg} \mathrm{~m}^{-3}$ forms face centred cubic crystals of edge length $200 \sqrt{2} \mathrm{pm}$. What is the molar mass of the solid? [Avogadro constant $\cong 6 \times 10^{23} \mathrm{~mol}^{-1}, \pi \cong 3$ ]
Select the correct option:
A
$0.0305 \mathrm{~kg} \mathrm{~mol}^{-1}$
B
$0.4320 \mathrm{~kg} \mathrm{~mol}^{-1}$
C
$0.0432 \mathrm{~kg} \mathrm{~mol}^{-1}$
D
$0.0216 \mathrm{~kg} \mathrm{~mol}^{-1}$
✓ Correct! Well done.
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