JEE Main 2021 — Solid State Question with Solution
From: JEE Main 2021 (Online) 25th February Evening Shift
Question
The unit cell of copper corresponds to a face centered cube of edge length 3.596 with one copper atom at each lattice point. The calculated density of copper in kg/m3 is ___________. [Molar mass of Cu : 63.54 g; Avogadro Number = 6.022 1023]
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Show full solutionCorrect answer: 9076.26
Correct answer
9076.26
Step-by-step explanation
Density of copper,
Given, Z = 4, for fcc lattice,
M = 63.54 g mol1
= 63.54 103 kg mol1,
a = 3.596 = 3.596 1010 m,
NA = 6.022 1023 mol1
On putting given values, we get
kg/m3
kg/m3
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