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Elements, Compounds, and Mixtures

Elements, Compounds, and Mixtures. 1. Which of the bottles pictured above contain matter?. All the bottles contain matter. 2. Which of the bottles contain a single pure substance?. Bottles (a) and (b). 3. Explain your answer to question #2. Pure substances include elements and compounds.

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Elements, Compounds, and Mixtures

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  1. Elements, Compounds, and Mixtures

  2. 1. Which of the bottles pictured above contain matter? • All the bottles contain matter.

  3. 2. Which of the bottles contain a single pure substance? • Bottles (a) and (b).

  4. 3. Explain your answer to question #2. • Pure substances include elements and compounds.

  5. 4. How many elements are present in each molecule of water? • Two.

  6. 5. What is the ratio of hydrogen atoms to oxygen atoms in a water molecule? • Two hydrogens for each oxygen.

  7. 6. As you know, ice is frozen water. What would you expect the ratio of hydrogen atoms to oxygen atoms to be in a molecule of ice? • Two hydrogens for each oxygen. 7. Explain your answer to question #6 • Ice and water are the same substance (H2O)

  8. 8. Bottles (c) and (d) both contain mixtures. How are these mixtures similar? • They are both mixtures of hydrogen and oxygen.

  9. 9. Bottles (c) and (d) both contain mixtures. How are these mixtures different ? • The amounts of hydrogen and oxygen vary.

  10. 10. How can we prove that saltwater is a mixture? • By separating it into salt and water through physical means. Or • By having samples of saltwater that vary in the ratio of salt and water.

  11. 11a. Rice Pudding

  12. a. Rice Pudding Heterogeneous mixture

  13. b. Copper

  14. b. Copper Element

  15. c. Propane

  16. c. Propane C3H8 compound

  17. d. Air

  18. d. Air Homogeneous Mixture (Solution)

  19. e. Magnesium Chloride

  20. e. Magnesium Chloride MgCl2 compound

  21. f. Mercury

  22. f. Mercury Element

  23. g. Maple Syrup

  24. g. Maple Syrup Homogeneous Mixture (Solution)

  25. h. Baking Soda

  26. h. Baking Soda NaHCO3 compound

  27. i. Chex Party Mix

  28. i. Chex Party Mix Heterogeneous mixture

  29. j. White Gold

  30. j. White Gold An alloy of gold and a white metal such as nickel or palladium Homogeneous Mixture (Solution)

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