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Zinc selenide, ZnSe, crystallizes in a f...

Zinc selenide, ZnSe, crystallizes in a face-centered cubic unit cell and has a density of 5.267 g/cc. Calculate the edge length of the unit cell.

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To find the edge length of the unit cell of zinc selenide (ZnSe) which crystallizes in a face-centered cubic (FCC) structure, we can use the relationship between density, molecular weight, and the edge length of the unit cell. ### Step-by-Step Solution: **Step 1: Identify the parameters.** - Given: - Density (d) = 5.267 g/cm³ - Molecular weight (M) of ZnSe = 144.4 g/mol (calculated as the sum of atomic weights of Zn and Se) ...
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Knowledge Check

  • In face -centered cubic unit cell, edge length is

    A
    `4/sqrt3` r
    B
    `4/sqrt2` r
    C
    2r
    D
    `sqrt3/2` r