worksheet: elements, compounds, and mixtures. 1. which of the bottles pictured above contain matter?...
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![Page 1: Worksheet: Elements, Compounds, and Mixtures. 1. Which of the bottles pictured above contain matter? All the bottles contain matter](https://reader030.vdocuments.site/reader030/viewer/2022033010/56649f525503460f94c7563c/html5/thumbnails/1.jpg)
Worksheet: Elements, Compounds, and Mixtures
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1. Which of the bottles pictured above contain matter?
• All the bottles contain matter.
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2. Which of the bottles contain a single pure substance?
• Bottles (a) and (b).
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3. Explain your answer to question #2.
• Pure substances include elements and compounds.
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4. How many elements are present in each molecule of water?
• Two.
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5. What is the ratio of hydrogen atoms to oxygen atoms in a water molecule?
• Two hydrogens for each oxygen.
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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)
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8. Bottles (c) and (d) both contain mixtures. How are these mixtures similar?
• They are both mixtures of hydrogen and oxygen.
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9. Bottles (c) and (d) both contain mixtures. How are these mixtures different ?
• The amounts of hydrogen and oxygen vary.
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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.
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11a. Rice Pudding
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a. Rice Pudding
Heterogeneous mixture
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b. Copper
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b. Copper
Element
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c. Propane
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c. Propane
C3H8 compound
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d. Air
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d. Air
Homogeneous Mixture (Solution)
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e. Magnesium Chloride
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e. Magnesium Chloride
MgCl2 compound
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f. Mercury
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f. Mercury
Element
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g. Maple Syrup
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g. Maple Syrup
Homogeneous Mixture (Solution)
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h. Baking Soda
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h. Baking Soda
NaHCO3 compound
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i. Chex Party Mix
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i. Chex Party Mix
Heterogeneous mixture
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j. White Gold
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j. White Gold
An alloy of gold and a white metal such as nickel or palladium
Homogeneous Mixture (Solution)