A balloon filled with 0.500 L of air at sea level is submerged in the water to a depth that produces

Question 1 of 12    0.0/ 4.0 Points
A balloon filled with 0.500 L of air at sea level is submerged in the water to a depth that produces a pressure of 3.25 atm. What is the volume of the balloon at this depth?

A. 1.63 L   

B. 0.615 L   

C. 0.154 L   
   

D. 6.50 L   

E. none of the above   


Answer Key: C
Question 2 of 12    4.0/ 4.0 Points
What is the major component of the air we breathe?

A. carbon dioxide   
   

B. nitrogen   

C. smog   

D. oxygen   

E. argon   


Answer Key: B
Question 3 of 12    4.0/ 4.0 Points
What is the equivalent pressure of 0.905 atm in units of mm Hg?

A. 840   

B. 0.905   

C. 13.3   
   

D. 688   

E. none of the above   


Answer Key: D
Question 4 of 12    4.0/ 4.0 Points
A sample of helium gas initially at 37.0°C, 785 torr and was heated to 58.0°C while the volume expanded to 3.24 L. What is the final pressure in atm?
   

A. 0.681   

B. 3.21   

C. 1.79   

D. 517   

E. none of the above   


Answer Key: A
Question 5 of 12    4.0/ 4.0 Points
You can increase the vapor pressure of a liquid by:

A. using a nonvolatile compound.   
   

B. increasing temperature.   

C. increasing the viscosity.   

D. establishing dynamic equilibrium.   

E. all of the above   


Answer Key: B
Question 6 of 12    4.0/ 4.0 Points
Liquids that have high vapor pressure and low boiling points are called

A. abnormal liquids.   

B. non-volatile liquids.   

C. viscous liquids.   
   

D. volatile liquids.   

E. none of the above   


Answer Key: D
Question 7 of 12    4.0/ 4.0 Points
What types of forces exist between I2 molecules?
   

A. dispersion forces   

B. hydrogen bonding   

C. ion-dipole forces   

D. dipole-dipole forces   

E. none of the above   


Answer Key: A
Question 8 of 12    4.0/ 4.0 Points
Which statement about surface tension is FALSE?

A. Molecules on the surface of the liquid have fewer molecules to interact with.   

B. Liquids tend to minimize their surface area.   
   

C. Items with densities lower than water will sink due to surface tension.   

D. Increased intermolecular forces increase surface tension.   

E. All of the above statements are true.   


Answer Key: C
Question 9 of 12    4.0/ 4.0 Points
A mothball can change directly from its solid phase to its gaseous phase. This process is known as:

A. melting.   

B. condensation.   

C. deposition.   
   

D. sublimation.   

E. none of the above   


Answer Key: D
Question 10 of 12    4.0/ 4.0 Points
Suppose you had a balloon containing 1 mole of helium at STP and a balloon containing 1 mole of oxygen at STP. Which statement is TRUE?
   

A. The balloons will have the same volume.   

B. The balloons will have the same mass.   

C. Both A) and B) are true.   

D. Neither A) nor B) are true.   

E. not enough information   


Answer Key: A
Question 11 of 12    0.0/ 5.0 Points
Identify the Intermolecular forces from STRONGEST to WEAKEST (strongest on the top) and place the following compounds in the appropriate row by identifying which Intermolecular forces they have. Then rank the compounds from lowest boiling point to highest. NH3, CO2, Ne, H2O, HCl, HF, NO

NH3<HF<H2O<Ne<HCl<CO2

Model Short Answer: Strongest: H bonding: H2O,HF ,NH3
Dipole-Dipole: HCl,NO
London Dispersion: CO2,Ne
Weakest

Lowest: Ne, CO2, NO, HCl, NH3, H2O, HF
(boiling point arranged lowest with LD forces in order of lowest to highest Molar Mass, then DD with low to high MM, then HB with low to high MM)


Question 12 of 12    2.0/ 5.0 Points
A balloon with an initial volume of 2.3L at a temperature of 299K is warmed to 376K. What is its volume at the final temperature?

2.89L