Balancing Equations Race Crossword

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Across

4. #8
6. #15
8. #16
10. #1
11. #3
14. #12
15. #17
16. #18
17. #9

Down

1. #6
2. #14
3. #13
4. #10
5. #4
7. #20
9. #5
12. #19
13. #7
16. #11
17. #2