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Section Date Partner's Name 50 21 42# 8 1. Mass of empty test tube 23. 2078 2. Mass of copper oxide + test tube 22

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Section Date Partner's Name 50 21 42# 8 1. Mass of empty test tube 23. 2078 2. Mass of copper oxide + test tube 22 828 890 3. Mass of copper + test tube 4. Mass of copper oxide 5. Mass of copper 6. Mass of oxygen mol 7. Moles of copper (use atomic mass of Cu) mol 8. Moles of oxygen (use atomic mass of O) 9. Empirical formula of copper oxide

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