11. They exist as minerals because they are oxidized.
12. a. We used the textbook given. b.Check with your teacher/instructor. c.No, the textbook was given to us in class.
13. The textbook is consistently reliable because it was given to us by our teacher.
14.The product will be completely inaccurate, and the entire lab will be ruined.
15. 602,000,000,000,000
16. a. 38 b.48 c.100 d.80
17. They have different masses.
18. a.1 mole b. 19.55 grams c.one tenth of a mole
19. 91.7% Cu 8.3% Ni
20. a.257.81 grams b. 263.74c grams c.100.09 grams
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