Elements Compounds and Mixtures 1 Which of the

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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

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

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.

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

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

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

5. What is the ratio of hydrogen atoms to oxygen atoms in a water

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

6. As you know, ice is frozen water. What would you expect the ratio

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 (H 2 O)

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

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

9. Bottles (c) and (d) both contain mixtures. How are these mixtures different ?

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

10. How can we prove that saltwater is a mixture? • By separating it

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 a. Rice Pudding

11 a. Rice Pudding

a. Rice Pudding Heterogeneous mixture

a. Rice Pudding Heterogeneous mixture

b. Copper

b. Copper

b. Copper Element

b. Copper Element

c. Propane

c. Propane

c. Propane C 3 H 8 compound

c. Propane C 3 H 8 compound

d. Air

d. Air

d. Air Homogeneous Mixture (Solution)

d. Air Homogeneous Mixture (Solution)

e. Magnesium Chloride

e. Magnesium Chloride

e. Magnesium Chloride Mg. Cl 2 compound

e. Magnesium Chloride Mg. Cl 2 compound

f. Mercury

f. Mercury

f. Mercury Element

f. Mercury Element

g. Maple Syrup

g. Maple Syrup

g. Maple Syrup Homogeneous Mixture (Solution)

g. Maple Syrup Homogeneous Mixture (Solution)

h. Baking Soda

h. Baking Soda

h. Baking Soda Na. HCO 3 compound

h. Baking Soda Na. HCO 3 compound

i. Chex Party Mix

i. Chex Party Mix

i. Chex Party Mix Heterogeneous mixture

i. Chex Party Mix Heterogeneous mixture

j. White Gold

j. White Gold

j. White Gold An alloy of gold and a white metal such as nickel

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

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