Question 15 Copper crystallises into a fcc lattice with edge length 3.61 × 10–8 cm. Show that the calculated density is in agreement with its measured value of 8.92 g cm-3. Chapter 1: the Solid State Chemistry Class 12 solutions are developed for assisting understudies with working on their score and increase knowledge of the subjects. 15 Copper crystallises into a fcc lattice with edge length 3.61 × 10–8 cm. Show that the calculated density is in agreement with its measured value of 8.92 g cm-3 is solved by our expert teachers. You can get ncert solutions and notes for class 12 chapter 1 absolutely free. NCERT Solutions for class 12 Chemistry Chapter 1: the Solid State is very essencial for getting good marks in CBSE Board examinations

Question 15 Copper crystallises into a fcc lattice with edge length 3.61 × 10^–8 cm. Show that the calculated density is in agreement with its measured value of 8.92 g cm^-3.

AnswerGiven that
Length of edge, a = 3.61x10^–8 cm
Atomic mass of cupper, M = 63.55 g/mol
Avogadro constant, NA = 6.022x10²³ per mol
Number of atoms in unit cell of FCC, Z= 4
Use formula of density

$p=/frac{ZM}{{{a}^{3}}{{N}_{A}}}$

Plug the values in this formula we get

$p=/frac{4x63.55}{{{(3.61x{{10}^{-8}})}^{3}}(6.022x{{10}^{23}})}/frac{g}{c{{m}^{3}}}$
$p=/frac{254.2}{(47.04x{{10}^{-24}})(6.022x{{10}^{23}})}/frac{g}{c{{m}^{3}}}$
$p=/frac{254.2}{28.318}/frac{g}{c{{m}^{3}}}$
$p=8.92/frac{g}{c{{m}^{3}}}$

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15 Copper Crystallises Into a Fcc Lattice With Edge Length 3.61 × Exercise Chapter 1 the Solid State Chemistry Class

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