Chemistry · 2019
JEE Main · 11 January 2019, Shift 1 · Q52
A solid having density of 9 × 10^3 kg m^-3 forms face centred cubic crystals of edge length 200 √ 2 pm. What is the molar mass of the solid?…
A solid having density of $\displaystyle 9 \times 10^3 \mathrm{~kg} \mathrm{~m}^{-3}$ forms face centred cubic crystals of edge length $\displaystyle 200 \sqrt{2} \mathrm{pm}$. What is the molar mass of the solid ?
[Avogadro constant $\displaystyle \cong 6 \times 10^{23} \mathrm{~mol}^{-1}, \pi \cong 3$ ]
Official answer
(4)
$\displaystyle 0.0305 \mathrm{~kg} \mathrm{~mol}^{-1}$
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JEE Main 2019 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.