Question 8 Lithium is a solid phase of lithium still unknown to science. The only difference between it and ordinary lithium is that Lithium forms a crystal with an fcc unit cell and a lattice constant. Calculate the density of Lithium. Round your answer to significant digit

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Adan

Chemistry

21 March, 12:49

Question 8 Lithium is a solid phase of lithium still unknown to science. The only difference between it and ordinary lithium is that Lithium forms a crystal with an fcc unit cell and a lattice constant. Calculate the density of Lithium. Round your answer to significant digit

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Answers (1)

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Lillianna Massey · Answer 1

the density of lithium will be equal to: 0.582 g/cm^3

Explanation:

We have the following dа ta:

a = 430 pm = 4.3x10^-8 cm

molar mass of lithium MM = 6.97 g/mol

Since the cubic cell of lithium is cubic centered in the face, its value of Z will be equal to 4

Avogadro's number AN = 6.022x10^23 particles/mol

using the following formula we will calculate the density of lithium:

d = (Z*MM) / (a^3*AN) = (4*6.97) / ((4.3x10^-8) ^3 * (6.022x10^23)) = 0.582 g/cm^3