1. Investigating Matter
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2. Is chemistry the study of the submicroscopic, the microscopic, or the macroscopic, or all three?
Submicroscopic, because it deals with atoms and molecules, which can't be seen with a microscope.
Microscopic, because it pertains to the formation of crystals.
Macroscopic, because it deals with powders, liquids, and gases that fill beakers and flasks.
All of the above, because most everything is made of atoms and molecules.
Answer: D) All of the above, because most everything is made of atoms and molecules.
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3. Is chemistry the study of the submicroscopic, the microscopic, or the macroscopic, or all three?
Submicroscopic, because it deals with atoms and molecules, which can't be seen with a microscope.
Microscopic, because it pertains to the formation of crystals.
Macroscopic, because it deals with powders, liquids, and gases that fill beakers and flasks.
All of the above, because most everything is made of atoms and molecules.
Answer: D) All of the above, because most everything is made of atoms and molecules.
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4. Up close, we see a TV screen as a series of tiny dots (pixels)
Up close, we see a TV screen as a series of tiny dots (pixels). This is similar to a chemist's view of matter in that
the fundamental particles of matter can also be seen when looked at closely with a magnifying glass.
chemists find that matter is made of extremely small particles, such as atoms and molecules.
anything that a chemist can see, touch, hear, smell, or taste is an illusion.
elements are made up of only three basic types of matter.
Answer: B) chemists find that matter is made of extremely small particles, such as atoms and molecules.
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5. Up close, we see a TV screen as a series of tiny dots (pixels)
Up close, we see a TV screen as a series of tiny dots (pixels). This is similar to a chemist's view of matter in that
the fundamental particles of matter can also be seen when looked at closely with a magnifying glass.
chemists find that matter is made of extremely small particles, such as atoms and molecules.
anything that a chemist can see, touch, hear, smell, or taste is an illusion.
elements are made up of only three basic types of matter.
Answer: B) chemists find that matter is made of extremely small particles, such as atoms and molecules.
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6. Imagine that you can watch a small collection of molecules that are moving around slowly while vibrating and bumping against each other.
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7. The slower moving molecules then start to line up, but as they do so, their vibrations increase. Soon all the molecules are aligned and vibrating about fixed positions. What is happening?
The sample is being cooled, and the material is freezing.
The sample is being heated, and the material is melting.
The sample is being cooled, and the material is condensing.
The sample is being heated, and the material is boiling.
The sample is unchanged.
Answer: A) The sample is being cooled, and the material is freezing.
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8. The slower moving molecules then start to line up, but as they do so, their vibrations increase. Soon all the molecules are aligned and vibrating about fixed positions. What is happening?
The sample is being cooled, and the material is freezing.
The sample is being heated, and the material is melting.
The sample is being cooled, and the material is condensing.
The sample is being heated, and the material is boiling.
The sample is unchanged.
Answer: A) The sample is being cooled, and the material is freezing.
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9. What type of phase change does the following figure best describe?
Melting.
Condensation.
Evaporation.
Freezing.
Answer: A) Melting.
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10. What type of phase change does the following figure best describe?
Melting.
Condensation.
Evaporation.
Freezing.
Answer: A) Melting.
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11. The phase in which atoms and molecules no longer move is the
solid phase.
liquid phase.
gas phase.
none of the above.
Answer: D) none of the above.
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12. The phase in which atoms and molecules no longer move is the
solid phase.
liquid phase.
gas phase.
none of the above.
Answer: D) none of the above.
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13. The image shown represents which kind of matter?
An element.
A mixture.
A compound.
All of the above.
None of the above.
Answer: B) A mixture.
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14. The image shown represents which kind of matter?
An element.
A mixture.
A compound.
All of the above.
None of the above.
Answer: B) A mixture.
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15. At 80 K (–193°C), which is a liquid and which is a gas?
Oxygen, O2 Nitrogen, N2
Boiling Temp K (–183°C) 77 K (–196°C)
Oxygen is a liquid, and nitrogen is a gas.
Nitrogen is a liquid, and oxygen is a gas.
They are both liquids at 80 K (–193°C).
They are both gases at 80 K (–193°C).
Answer: A) Oxygen is a liquid, and nitrogen is a gas.
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16. At 80 K (–193°C), which is a liquid and which is a gas?
Oxygen, O2 Nitrogen, N2
Boiling Temp K (–183°C) 77 K (–196°C)
Oxygen is a liquid, and nitrogen is a gas.
Nitrogen is a liquid, and oxygen is a gas.
They are both liquids at 80 K (–193°C).
They are both gases at 80 K (–193°C).
Answer: A) Oxygen is a liquid, and nitrogen is a gas.
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17. Which has stronger attractions among its submicroscopic particles: a solid at 25°C or a gas at 25°C?
The attractions within the solid must be stronger than the attractions among the particles of the gas.
The submicroscopic particles of the gas are moving faster. This means that they have more energy, which means that the attractions among them must be stronger.
The attractions among the submicroscopic particles of the solid are much stronger—so much stronger that they hold the particles of the solid absolutely still.
The temperatures of these two materials are the same, which means that the attractions among their submicroscopic particles are also of the same strength.
Answer: A) The attractions within the solid must be stronger than the attractions among the particles of the gas.
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18. Which has stronger attractions among its submicroscopic particles: a solid at 25°C or a gas at 25°C?
The attractions within the solid must be stronger than the attractions among the particles of the gas.
The submicroscopic particles of the gas are moving faster. This means that they have more energy, which means that the attractions among them must be stronger.
The attractions among the submicroscopic particles of the solid are much stronger—so much stronger that they hold the particles of the solid absolutely still.
The temperatures of these two materials are the same, which means that the attractions among their submicroscopic particles are also of the same strength.
Answer: A) The attractions within the solid must be stronger than the attractions among the particles of the gas.
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19. The following boxes represent the number of submicroscopic particles within a given volume of a particular substance at different temperatures. Which box represents the greatest temperature? A B C
Answer: C) C A B C
Not possible to tell.
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20. The following boxes represent the number of submicroscopic particles within a given volume of a particular substance at different temperatures. Which box represents the greatest temperature? A B C
Answer: C) C A B C
Not possible to tell.
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21. What is the gas found within a bubble of boiling water?
Air.
Chlorine from the water.
Water vapor.
Hydrogen.
Answer: C) Water vapor.
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22. What is the gas found within a bubble of boiling water?
Air.
Chlorine from the water.
Water vapor.
Hydrogen.
Answer: C) Water vapor.
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23. Physical or chemical change?
Chemical, because of the formation of elements.
Physical, because a new material has been formed.
Chemical, because the atoms are connected differently.
Physical, because of a change in phase.
Answer: C) Chemical, because the atoms are connected differently.
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24. Physical or chemical change?
Chemical, because of the formation of elements.
Physical, because a new material has been formed.
Chemical, because the atoms are connected differently.
Physical, because of a change in phase.
Answer: C) Chemical, because the atoms are connected differently.
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25. Molecule A: Molecule B:
Based on the following diagrams, which substance has the lower boiling point?
Molecule A: Molecule B:
Molecule A, which is the first to transform into a liquid.
Molecule B, which is the first to transform into a liquid.
Molecule A, which remains in the gaseous phase.
Molecule B, which remains in the gaseous phase.
Answer: C) Molecule A, which remains in the gaseous phase.
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26. Molecule A: Molecule B:
Based on the following diagrams, which substance has the lower boiling point?
Molecule A: Molecule B:
Molecule A, which is the first to transform into a liquid.
Molecule B, which is the first to transform into a liquid.
Molecule A, which remains in the gaseous phase.
Molecule B, which remains in the gaseous phase.
Answer: C) Molecule A, which remains in the gaseous phase.
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27. Which of the following boxes contains an element? A compound? A mixture?
A B C
Element: A, C Compound: A, B, C Mixture: A, B
Element: C Compound: A, B Mixture: B
Element: C Compound: B Mixture: A
Element: A, C Compound: A, B Mixture: A, B
Answer: C) Element: C Compound: B Mixture: A
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28. Which of the following boxes contains an element? A compound? A mixture?
A B C
Element: A, C Compound: A, B, C Mixture: A, B
Element: C Compound: A, B Mixture: B
Element: C Compound: B Mixture: A
Element: A, C Compound: A, B Mixture: A, B
Explanation: "A" contains a mixture of both elements and compounds.
Answer: C) Element: C Compound: B Mixture: A
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29. What is the difference between a compound and a mixture?
They both consist of atoms from different elements.
The way in which their atoms are bonded together.
One is a solid, and the other is a liquid.
The components of a mixture are not chemically bonded together.
Answer: D) The components of a mixture are not chemically bonded together.
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30. What is the difference between a compound and a mixture?
They both consist of atoms from different elements.
The way in which their atoms are bonded together.
One is a solid, and the other is a liquid.
The components of a mixture are not chemically bonded together.
Answer: D) The components of a mixture are not chemically bonded together.
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31. Why can't the elements of a compound be separated from one another by physical means?
They are too homogenous when found within a compound.
Their atoms are too tightly bound to one another.
Elements found within a compound tend to be inert.
Elements tend not to be soluble in water.
Answer: B) Their atoms are too tightly bound to one another.
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32. Why can't the elements of a compound be separated from one another by physical means?
They are too homogenous when found within a compound.
Their atoms are too tightly bound to one another.
Elements found within a compound tend to be inert.
Elements tend not to be soluble in water.
Answer: B) Their atoms are too tightly bound to one another.
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33. Classify the following changes as physical or chemical: Wood burns to ashes; water begins to boil; grass grows.
Chemical; Chemical; Physical
Chemical; Physical; Physical
Physical; Physical; Chemical
Chemical; Physical; Chemical
Answer: D) Chemical; Physical; Chemical
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34. Classify the following changes as physical or chemical: Wood burns to ashes; water begins to boil; grass grows.
Chemical; Chemical; Physical
Chemical; Physical; Physical
Physical; Physical; Chemical
Chemical; Physical; Chemical
Answer: D) Chemical; Physical; Chemical
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35. What chemical change occurs when a wax candle burns?
The wax near the flame melts.
The molten wax is pulled upwards through the wick.
The wax within the wick is heated to about 600°C.
The heated wax molecules combine with oxygen molecules.
Answer: D) The heated wax molecules combine with oxygen molecules.
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36. What chemical change occurs when a wax candle burns?
The wax near the flame melts.
The molten wax is pulled upwards through the wick.
The wax within the wick is heated to about 600°C.
The heated wax molecules combine with oxygen molecules.
Answer: D) The heated wax molecules combine with oxygen molecules.
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37. Oxygen atoms are used to make water molecules
Oxygen atoms are used to make water molecules. Does this mean that oxygen, O2, and water, H2O, have similar properties?
Yes, and this explains how fish are able to breathe water.
Yes, but that their properties are similar is only a coincidence.
No, but their similar properties are only a coincidence.
No, compounds are uniquely different from the elements from which they are made.
Answer: D) No, compounds are uniquely different from the elements from which they are made.
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38. Oxygen atoms are used to make water molecules
Oxygen atoms are used to make water molecules. Does this mean that oxygen, O2, and water, H2O, have similar properties?
Yes, and this explains how fish are able to breathe water.
Yes, but that their properties are similar is only a coincidence.
No, but their similar properties are only a coincidence.
No, compounds are uniquely different from the elements from which they are made.
Answer: D) No, compounds are uniquely different from the elements from which they are made.
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39. Why do most people, including chemists, prefer to use the common names of certain compounds?
The common names are shorter and easier to pronounce.
These compounds are encountered frequently.
The common names are more widely known.
All of the above.
Answer: D) All of the above.
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40. Why do most people, including chemists, prefer to use the common names of certain compounds?
The common names are shorter and easier to pronounce.
These compounds are encountered frequently.
The common names are more widely known.
All of the above.
Answer: D) All of the above.
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41. What is the common name for dioxygen oxide?
Dry Ice
Ozone
None of the above
Answer: C) Ozone
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42. What is the common name for dioxygen oxide?
Dry Ice
Ozone
None of the above
Answer: C) Ozone
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43. What is the chemical formula for calcium chloride?
CaCl
Ca2Cl
CaCl2
Ca2Cl2
Answer: C) CaCl2
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44. What is the chemical formula for calcium chloride?
CaCl
Ca2Cl
CaCl2
Ca2Cl2
Answer: C) CaCl2
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45. What is the chemical name for Ag2S?
Silver sulfide
Disilver sulfide
Silver tarnish
Silver disulfide
Answer: A) Silver sulfide
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46. What is the chemical name for Ag2S?
Silver sulfide
Disilver sulfide
Silver tarnish
Silver disulfide
Answer: A) Silver sulfide
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