RbBr has a face-centered cubic unit cell in which the Br- anions occupy corners and face centers, while the cations fit into the hole between adjacent anions. What is its density (in g/cm3) if the ionic radii of Rb+, Br- ions are 149.8 pm and 195.0 pm, respectively? Hint: notice that the cation and anion touch each other and together make up the side of the cube.

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Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter9: Liquids, Solids, And Materials

Section9.6: Crystalline Solids

Problem 9.12E: Crystalline polonium has a primitive cubic unit cell, lithium has a body-centered cubic unit cell,...

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RbBr has a face-centered cubic unit cell in which the Br^- anions occupy corners and face centers, while the cations fit into the hole between adjacent anions. What is its density (in g/cm³) if the ionic radii of Rb⁺, Br^- ions are 149.8 pm and 195.0 pm, respectively? Hint: notice that the cation and anion touch each other and together make up the side of the cube.

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