Question 1

The main reason that gold mining is one of the dirtiest mining activities is that

Accepted Answer

A) only a few ounces of gold are recovered for each ton of rock mined. 
B) many chemicals must be used to extract gold from the earth. 
C) gold is only found deep underground.Digging tunnels creates a lot of dirt. 
D) gold is only found in remote areas so mining it contributes significantly to emission of carbon dioxide because of the distances that miners must travel. 
A) only a few ounces of gold are recovered for each ton of rock mined. 
B) many chemicals must be used to extract gold from the earth. 
C) gold is only found deep underground.Digging tunnels creates a lot of dirt. 
D) gold is only found in remote areas so mining it contributes significantly to emission of carbon dioxide because of the distances that miners must travel.

Question 2

When water transitions from a liquid to a gas, which of the following statements is false?

Accepted Answer

A) The liquid molecules took on the shape of their container. 
B) The gas molecules are further apart than the liquid molecules were. 
C) The gas molecules expand to fill their container. 
D) The liquid molecules were all at the very top of the container before they transitioned to a gas. 
A) The liquid molecules took on the shape of their container. 
B) The gas molecules are further apart than the liquid molecules were. 
C) The gas molecules expand to fill their container. 
D) The liquid molecules were all at the very top of the container before they transitioned to a gas.

Question 3

Which one is chemical change?

Accepted Answer

A) a puddle freezing 
B) a marshmallow turning brown when roasted 
C) the alcohol in a bottle of rubbing alcohol disappearing when the lid is not put on after use 
D) ice on the sidewalk melting after salt has been sprinkled on it 
A) a puddle freezing 
B) a marshmallow turning brown when roasted 
C) the alcohol in a bottle of rubbing alcohol disappearing when the lid is not put on after use 
D) ice on the sidewalk melting after salt has been sprinkled on it

Question 4

How many atoms of carbon are in the following compound? CH3(CH2)12COOH

Accepted Answer

A) 12 
B) 13 
C) 14 
D) 16 
A) 12 
B) 13 
C) 14 
D) 16

Question 5

Identify the alkaline earth metal.

Accepted Answer

A) Na 
B) Zn 
C) Ca 
D) C 
E) Cl 
A) Na 
B) Zn 
C) Ca 
D) C 
E) Cl

Question 6

Which of the following would be considered a physical change?

Accepted Answer

A) the metabolism of food 
B) an apple turning brown when left on the counter 
C) solid dry ice making "smoke" 
D) a chain rusting 
A) the metabolism of food 
B) an apple turning brown when left on the counter 
C) solid dry ice making "smoke" 
D) a chain rusting

Question 7

Would the evaporation of water from a mixture of salt water be considered a chemical change?

Accepted Answer

A) Yes, since the water is separating chemically from the salt. 
B) Perhaps.It would depend if the salt changed color once all the water was gone. 
C) No, since the water is just changing phases, this is simply a physical change. 
D) Yes, since they would each have different properties once they were separated. 
A) Yes, since the water is separating chemically from the salt. 
B) Perhaps.It would depend if the salt changed color once all the water was gone. 
C) No, since the water is just changing phases, this is simply a physical change. 
D) Yes, since they would each have different properties once they were separated.

Question 8

Which of the three phases of matter expand to completely fill its container?

Accepted Answer

A) the liquid phase 
B) the solid phase 
C) the gas phase 
D) both the liquid and gas phases 
A) the liquid phase 
B) the solid phase 
C) the gas phase 
D) both the liquid and gas phases

Question 9

Based on the definition of a pure substance given in your book, which of the following could be classified as pure substances?

Accepted Answer

A) the air you breathe 
B) the water from a water fountain 
C) a milkshake 
D) chicken noodle soup 
E) a diamond 
A) the air you breathe 
B) the water from a water fountain 
C) a milkshake 
D) chicken noodle soup 
E) a diamond

Question 10

How many atoms of oxygen are in the following compound? Ca3(PO4)2

Accepted Answer

A) 2 
B) 4 
C) 6 
D) 8 
A) 2 
B) 4 
C) 6 
D) 8

The main reason that gold mining is one of the dirtiest mining activities is that

When water transitions from a liquid to a gas, which of the following statements is false?

Which one is chemical change?

How many atoms of carbon are in the following compound? CH₃(CH₂)₁₂COOH

Identify the alkaline earth metal.

Which of the following would be considered a physical change?

Would the evaporation of water from a mixture of salt water be considered a chemical change?

Which of the three phases of matter expand to completely fill its container?

Based on the definition of a pure substance given in your book, which of the following could be classified as pure substances?

How many atoms of oxygen are in the following compound? Ca₃(PO₄)₂

The Story of Chemistry the Scientific Method Think, Measure, Rethink

Atoms All About Atoms and Whats Inside Them

Bonds an Introduction to the Forces Within Substances

Carbon Elemental Carbon, Organic Molecules, and Carbon Footprints

Air a Study of the Gases in Our Atmosphere

Chemical Reactions How We Keep Track of Chemical Changes

Water Why Water Is Critical for Human Beings and the Planet

Salts and Aqueous Solutions the Nature of Salts and How They Interact With Water

Ph and Acid Rain Acid Rain and Our Environment

Nukes the Fundamentals of Nuclear Chemistry

Energy, Power, and Climate Change the Fundamentals of Nuclear Chemistry

Sustainability and Recycling Finding Better Ways to Use and Reuse Our Resources

Food the Biochemistry of the Foods We Eat

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Exam 3: Everything the Ways We Organize and Classify Matter

The main reason that gold mining is one of the dirtiest mining activities is that

When water transitions from a liquid to a gas, which of the following statements is false?

Which one is chemical change?

How many atoms of carbon are in the following compound? CH3(CH2)12COOH

Identify the alkaline earth metal.

Which of the following would be considered a physical change?

Would the evaporation of water from a mixture of salt water be considered a chemical change?

Which of the three phases of matter expand to completely fill its container?

Based on the definition of a pure substance given in your book, which of the following could be classified as pure substances?

How many atoms of oxygen are in the following compound? Ca3(PO4)2

The Story of Chemistry the Scientific Method Think, Measure, Rethink

Atoms All About Atoms and Whats Inside Them

Bonds an Introduction to the Forces Within Substances

Carbon Elemental Carbon, Organic Molecules, and Carbon Footprints

Air a Study of the Gases in Our Atmosphere

Chemical Reactions How We Keep Track of Chemical Changes

Water Why Water Is Critical for Human Beings and the Planet

Salts and Aqueous Solutions the Nature of Salts and How They Interact With Water

Ph and Acid Rain Acid Rain and Our Environment

Nukes the Fundamentals of Nuclear Chemistry

Energy, Power, and Climate Change the Fundamentals of Nuclear Chemistry

Sustainability and Recycling Finding Better Ways to Use and Reuse Our Resources

Food the Biochemistry of the Foods We Eat

Filters

How many atoms of carbon are in the following compound? CH₃(CH₂)₁₂COOH

How many atoms of oxygen are in the following compound? Ca₃(PO₄)₂