JEE Main Chemistry question
Not in JEE Main or NEET syllabus
A solid has a structure in which atoms are located at the cubic corners of the unit cell, atoms are at the edge centers, and atoms at the cube center. Then the formula of the compound is . If two atoms of are missing from any two edge centers per unit cell, then the molecular formula is . Find the value of .
Answer: 4
Solution
In the original cell, contributes , contributes 1 (body centre), and contributes , giving the formula (so ). When 2 of the 12 edge-centred
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