Question 1

What type of change in pressure causes the bends and why?

Accepted Answer

A)  an increase in pressure, because it results in nitrogen rapidly diffusing out of the bloodstream 
B)  an increase in pressure, because it results in nitrogen rapidly dissolving into the bloodstream 
C)  a decrease in pressure, because it results in nitrogen rapidly diffusing out of the bloodstream 
D)  a decrease in pressure, because it results in nitrogen slowly dissolving into the bloodstream 
E)  The bends is not a result of pressure changes. 
A)  an increase in pressure, because it results in nitrogen rapidly diffusing out of the bloodstream 
B)  an increase in pressure, because it results in nitrogen rapidly dissolving into the bloodstream 
C)  a decrease in pressure, because it results in nitrogen rapidly diffusing out of the bloodstream 
D)  a decrease in pressure, because it results in nitrogen slowly dissolving into the bloodstream 
E)  The bends is not a result of pressure changes.

Question 2

Formaldehyde, a common preservative, is shown in the illustration below. If liquid formaldehyde is boiled, which of the following choices best depicts how formaldehyde looks in the resulting vapor?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) e 
A) a 
B) b 
C) c 
D) d 
E) e

Question 3

What is the volume of 2.01 F1F1F1S1F1F1F10 10F1F1F1S1F1F1F103 moles of oxygen at STP?

Accepted Answer

A)  8.97 F1F1F1S1F1F1F10 10F1F1F1S1F1F1F105 L 
B)  0.00201 L 
C)  2.01 F1F1F1S1F1F1F10 10F1F1F1S1F1F1F103 L 
D)  4.50 F1F1F1S1F1F1F10 10F1F1F1S1F1F1F102 L 
E)  1.11 F1F1F1S1F1F1F10 104 L 
A)  8.97 F1F1F1S1F1F1F10 10F1F1F1S1F1F1F105 L 
B)  0.00201 L 
C)  2.01 F1F1F1S1F1F1F10 10F1F1F1S1F1F1F103 L 
D)  4.50 F1F1F1S1F1F1F10 10F1F1F1S1F1F1F102 L 
E)  1.11 F1F1F1S1F1F1F10 104 L

Question 4

When heat energy is added to a solid and liquid mix at the melting point, the temperature does not increase, as illustrated by horizontal line C. Which of the statements below best describes what happens to the heat energy added to the solid and liquid?

Accepted Answer

A)  It increases the kinetic energy of the molecules. 
B)  It decreases the kinetic energy of the molecules. 
C)  It breaks the intermolecular forces between the molecules. 
D)  It makes new intermolecular forces between molecules. 
E)  It just passes through the solid and liquid, which is why the temperature does not increase. 
A)  It increases the kinetic energy of the molecules. 
B)  It decreases the kinetic energy of the molecules. 
C)  It breaks the intermolecular forces between the molecules. 
D)  It makes new intermolecular forces between molecules. 
E)  It just passes through the solid and liquid, which is why the temperature does not increase.

Question 5

Which of the following physical change is the result of a decrease in temperature?

Accepted Answer

A)  vaporization 
B)  sublimation 
C)  melting 
D)  freezing 
E)  All of the above 
A)  vaporization 
B)  sublimation 
C)  melting 
D)  freezing 
E)  All of the above

What type of change in pressure causes the bends and why?

Formaldehyde, a common preservative, is shown in the illustration below. If liquid formaldehyde is boiled, which of the following choices best depicts how formaldehyde looks in the resulting vapor?

What is the volume of 2.01  10^³ moles of oxygen at STP?

When heat energy is added to a solid and liquid mix at the melting point, the temperature does not increase, as illustrated by horizontal line C. Which of the statements below best describes what happens to the heat energy added to the solid and liquid?

Which of the following physical change is the result of a decrease in temperature?

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Compounds and Molecules

Chemical Quantities and Chemical Reactions

Organic Chemistry: Hydrocarbons

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

Acids and Bases

The Reactions of Organic Functional Groups in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

Exam 5: Changes of State and the Gas Laws

What type of change in pressure causes the bends and why?

Formaldehyde, a common preservative, is shown in the illustration below. If liquid formaldehyde is boiled, which of the following choices best depicts how formaldehyde looks in the resulting vapor?

What is the volume of 2.01  103 moles of oxygen at STP?

When heat energy is added to a solid and liquid mix at the melting point, the temperature does not increase, as illustrated by horizontal line C. Which of the statements below best describes what happens to the heat energy added to the solid and liquid?

Which of the following physical change is the result of a decrease in temperature?

Measuring Matter and Energy

Atomic Structure and Nuclear Radiation

Compounds and Molecules

Chemical Quantities and Chemical Reactions

Organic Chemistry: Hydrocarbons

Organic Chemistry and Biomolecules

Solutions, Colloids and Membranes

Acids and Bases

The Reactions of Organic Functional Groups in Biochemistry

Carbohydrates: Structure and Function

Lipids: Structure and Function

Proteins: Structure and Function

Nucleotides and Nucleic Acids

Energy and Metabolism

Filters

What is the volume of 2.01  10^³ moles of oxygen at STP?