The Cubic Unit Cell of Rhenium Trioxide (ReO₃) Has Re

question 108

Multiple Choice

The cubic unit cell of rhenium trioxide (ReO₃) has Re atoms at the corners and O atoms on each of the 12 edges. The atoms touch along the edges. The radii are Re 137 pm and O 73 pm. What is the density of ReO₃?

• A)2.55 g/cm³
• B)2.94 g/cm³
• C)3.49 g/cm³
• D)5.25 g/cm³
• E)7.52 g/cm³

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