题目
单项选择题
An ionic solid composed of Ba, Zr, and O ions has the cubic unit cell shown above. The unit cell has barium atoms at the corners, a zirconium atom in the cube center, and oxygen anions in the cube faces. What is the empirical formula of the compound?
选项
A.B
a
Z
r
O
6
B.B
a
Z
r
O
4
C.B
a
8
Z
r
O
3
D.None of the others.
E.B
a
8
Z
r
O
6
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标准答案
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思路分析
The question asks for the empirical formula of an ionic solid with Ba at the corners of a cubic unit cell, Zr at the cube center, and O on the faces.
First, determine the contributions: Ba at corners contribute 1 Ba per formula unit (8 corners × 1/8 each = 1). Zr at the center contributes 1 Zr per formula unit (1 atom per cell). O at the faces contribute 3 O per formula ......Login to view full explanation登录即可查看完整答案
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