A Certain Compound with a Molar Mass of 138

question 95

Multiple Choice

A certain compound with a molar mass of 138.0 g/mol crystallizes with the sodium chloride (rock salt) structure. The length of an edge of the unit cell is 488 pm. What is the density of this compound?

• A) 1.97 g/cm³
• B) 1.88 g/cm³
• C) 4.75 g/cm³
• D) 7.89 g/cm³
• E) 1.19 g/cm³

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