Solutions for Superconductivity Chemistry Problems

1. 44.0 g/mole
2. 32.0 g/mole
3. 79.6 g/mole
4. 197.4 g/mole
5. 18.0 g/mole
6. 225.8 g/mole
7. 666.2 g/mole
8. 888.4 g/mole
9. 0.375 mole Y, 0.750 mole Ba, 1.13 mole Cu, 2.63 mole O
10. 32.9g Y, 103g Ba, 71.8g Cu, 42.1g O
11. BaCO(3) -----> BaO + CO(2)
    Y(2)O(3) + 4BaO + 6CuO ---> 2YBa(2)Cu(3)O(6.5)

12. 1/4 mole per mole YBa(2)Cu(3)O(7)
13. To oxygenate the YBCO to make it superconducting.
14. Black
15. Type II
16. Perovskites
17. 92 K
18. Copper
19. The YBCO can be kept in a closed container along with anhydrous CaSO(4), which absorbs water vapor.
20. 2Bi(2)O(3) + (X)SrO + (Y)CaO + 4CuO --> Bi(4)(Sr,Ca)(6)Cu(4)O(16) Where (X)+(Y)=6
21. See in the Fundamentals of Superconductors section.

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