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Chemistry - Solid State Question with Solution | TestHub

ChemistrySolid StateCubic CrystalsMedium2 minPYQ_2023

ChemistryMediumsingle choice

Calculate the molar mass of an element having density $21 g cm^{- 3}$ that forms fcc unit cell $[a^{3} \cdot N_{A} = 36 cm^{3} mol^{- 1}]$

Options:

Answer:

Solution:

$Density (ρ) = \frac{M n}{a ^{3} N _{A}} ∴ 21 g cm^{- 3} = \frac{M \times 4}{36 cm ^{3} mol ^{- 1}} ∴ M = \frac{21 g cm ^{- 3} \times 36 cm ^{3} mol ^{- 1}}{4} = 189.00 g mol^{- 1}$

Stream:MHT_CETSubject:ChemistryTopic:Solid StateSubtopic:Cubic Crystals

⏱ 2mℹ️ Source: PYQ_2023

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