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Q. |
The constituents of this material that is yttrium, barium and copper are in |
A. | 1:1:1 |
B. | 1:2:2 |
C. | 1:2:3 |
D. | 1:2:1 |
Answer» C. 1:2:3 | |
Explanation: the constituents of this material |
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