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Chemistry - Solid State Question with Solution | TestHub

ChemistrySolid StateCubic CrystalsEasy2 minPYQ_2020

ChemistryEasysingle choice

An element crystallises in a fcc lattice with cell edge $250 pm$ . Calculate the density of an element (at.mass $= 90 \cdot 3$ )

Options:

Answer:

Solution:

$a = 250 pm = 2.5 \times 1 0^{- 8} cm$ $M = 90.3 g mol^{- 1}, n = 4 ($ for fcc cell $)$ $ρ = \frac{n \times M}{a ^{3} \times N _{A}} = \frac{4 \times 90.3}{( 2.5 \times 1 0 ^{- 8} ) ^{3} \times 6.022 \times 1 0 ^{23}}$ $∴ ρ = 38.40 g cm^{- 3}$

Stream:MHT_CETSubject:ChemistryTopic:Solid StateSubtopic:Cubic Crystals

⏱ 2mℹ️ Source: PYQ_2020

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