Sodium sulfate (Na2SO4) crystallizes in the orthorhombic system in a unit cell with a = 5.863 Å, b= 12.304 Å, and c=9.821 Å. The density of these crystals is 2.663 g cm-3. Determine how many Na2SO4 formula units are present inthe unit cell.

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A: The explanation is given below-

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Q: Question attached

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A:

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A:

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Crystal Lattices and Unit Cell

Consider a crystal. The regular and repeating pattern of constituent particles is the most distinguishing feature of crystalline solids. A crystal lattice is formed when these particles are replaced with representative points. The three-dimensional arrangement of constituent particles is known as a crystal lattice. Unit cell is that the smallest portion of a space lattice which when repeated in several directions, generate the whole lattice. Unit cell is a building block of a lattice. It is the smallest unit of cell.