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Test: AP Chemistry
| 1. | What is the oxidation number of Cr, S, and Fe in the following substances: (a) K2Cr2O7 (b) H2SO4 (c) Fe2O3. |
3, 3, 3
6, 6, 6
3, 6, 6
6, 6, 3
3, 6, 3
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