Density of lithium atom is - 0-53 g- cm-3- The edge length of - Li- is - 3-5-A- What is the number of lithium atoms in a unit cell- -Atomic mass of lithium is - 6-94-

a=3.5 A , ρ= 0.53g/cm^3 , M_A=6.94 , Z=? ρ=Z× M_AN_A× a^3 0.53= Z× 6.946.023× 10^23× 42.875× 10^ 24 Z=2 Therefore, 2 at ...

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Density

Density of li...

Question

Density of lithium atom is $0.53 g / c m^{3}$ . The edge length of $L i$ is $3.5 \circ A$ . What is the number of lithium atoms in a unit cell? (Atomic mass of lithium is $6.94$ )

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3.5 ˚ A

0.53 g c m^{- 3}

o A

^{- 3}

L i = 6.94

530 {kg m}^{- 3}

6.94 {g mol}^{- 1}

N_{A} = 6.02 \times 10^{23} {mol}^{- 1}

0.53

/ c m^{3}

3.5

o A

N_{A} = 6.02 \times 10^{23}

M = 6.94

m o l^{- 1}

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