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Lead sulfide has fcc structure. The edge...

Lead sulfide has fcc structure. The edge length of the unit cell of PbS crystal is 500 pm What is its density ?

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To calculate the density of lead sulfide (PbS) with a face-centered cubic (FCC) structure, we can follow these steps: ### Step 1: Identify the given data - **Edge length (a)** = 500 pm = \(500 \times 10^{-12}\) m - **Number of formula units per unit cell (Z)** = 4 (for FCC structure) - **Molar mass of PbS** = Molar mass of Pb (Lead) + Molar mass of S (Sulfur) ### Step 2: Calculate the molar mass of PbS ...
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Knowledge Check

  • A unit of cell of sodium chloride has four formula units. The edge length of the unit cell is 0.564 nm . What is the density of sodium chloride?

    A
    `"3.89 g cm"^(-3)`
    B
    `"2.16 g cm"^(-3)`
    C
    `"3 g cm"^(-3)`
    D
    `"1.82 g cm"^(-3)`