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JEE Main Chemistry question

ChemistryThe Solid StateJEE Main

Not in JEE Main or NEET syllabus

Ferrous oxide has a cubic structure and each edge of the unit cell is Å. Assuming the density of the oxide as , the number of and ions present in each unit cell is

Answer: (D)

Solution

Let be the number of FeO formula units per unit cell. Molar mass of FeO , and the unit cell volume is . Using density

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Question ID VK-134270