Question 1

The boiling point of 1,4-butanediol is 230°C. Would you expect this compound to be soluble or insoluble in room-temperature water?

Accepted Answer

A) Since there are no polar areas on this molecule, it is insoluble in water at room temperature. 
B) A high boiling point means that the substance interacts with itself quite strongly. Therefore this molecule is not soluble in water. 
C) Since there are polar areas on this molecule, it is insoluble in water at room temperature. 
D) Water would be attracted to both ends of 1,4 butanediol, and it is infinitely soluble in water. 
A) Since there are no polar areas on this molecule, it is insoluble in water at room temperature. 
B) A high boiling point means that the substance interacts with itself quite strongly. Therefore this molecule is not soluble in water. 
C) Since there are polar areas on this molecule, it is insoluble in water at room temperature. 
D) Water would be attracted to both ends of 1,4 butanediol, and it is infinitely soluble in water.

Question 2

A 1 molar solution of sugar water contains ________.

Accepted Answer

A) 1 mole of sucrose 
B) 342 grams of sucrose 
C) 6.02 × 1023 molecules of sucrose 
D) all of the above 
E) Not enough information is given 
A) 1 mole of sucrose 
B) 342 grams of sucrose 
C) 6.02 × 1023 molecules of sucrose 
D) all of the above 
E) Not enough information is given

Question 3

In which of the following molecules will water induce a temporary dipole?

Accepted Answer

A) CO2 
B) O2 
C) N2 
D) all of the above 
E) none of the above 
A) CO2 
B) O2 
C) N2 
D) all of the above 
E) none of the above

Question 4

An inventor claims to have developed a new perfume that lasts a long time because it doesn't evaporate. Comment on this claim.

Accepted Answer

A) A perfume that does not evaporate could be toxic since the molecules never leave the skin. 
B) In order to smell something, the molecules must evaporate and reach your nose. If the new perfume doesn't evaporate, it will not have an odor. 
C) This would be impossible to make because the perfume would have to be pressurized in order to not evaporate. 
D) This product is sure to sweep the market making many happy customers. 
A) A perfume that does not evaporate could be toxic since the molecules never leave the skin. 
B) In order to smell something, the molecules must evaporate and reach your nose. If the new perfume doesn't evaporate, it will not have an odor. 
C) This would be impossible to make because the perfume would have to be pressurized in order to not evaporate. 
D) This product is sure to sweep the market making many happy customers.

Question 5

What is the special property of a semipermeable membrane that makes osmosis possible?

Accepted Answer

A) The pores in the membrane only allow water to pass through. 
B) Water only moves through the membrane in one direction. 
C) Only the ions travel through the membrane. 
D) Ions only move one way through the membrane. 
E) none of the above 
A) The pores in the membrane only allow water to pass through. 
B) Water only moves through the membrane in one direction. 
C) Only the ions travel through the membrane. 
D) Ions only move one way through the membrane. 
E) none of the above

Question 6

Why might sodium carbonate (washing soda, Na2CO3)be added to hard water to aid in cleaning?

Accepted Answer

A) The hard ions in the water are more attracted to the carbonate ions -2 charge. 
B) The hard ions are dissolved by the added sodium ions. 
C) The soap gets softer due to the added ions. 
D) The ions solubilize the soap due to ion-ion intermolecular attraction, which improves the cleaning ability. 
E) none of the above 
A) The hard ions in the water are more attracted to the carbonate ions -2 charge. 
B) The hard ions are dissolved by the added sodium ions. 
C) The soap gets softer due to the added ions. 
D) The ions solubilize the soap due to ion-ion intermolecular attraction, which improves the cleaning ability. 
E) none of the above

Question 7

Which of the following molecules is most likely to show a dipole-dipole interaction?

Accepted Answer

A) CH3OH 
B) CH3SH 
C) CH4 
D) H-C   C-H 
E) A and B 
A) CH3OH 
B) CH3SH 
C) CH4 
D) H-C   C-H 
E) A and B

Question 8

If the solubility of a compound is 72 grams per liter at a given temperature, how many grams of the compound will dissolve in 0.50 liters at the same temperature?

Accepted Answer

A) 36 g 
B) 72 g 
C) 144 g 
D) 30 g 
E) none of the above 
A) 36 g 
B) 72 g 
C) 144 g 
D) 30 g 
E) none of the above

Question 9

From the schematic above: why do nonpolar molecules have a difficult time passing through the bilipid layer?

Accepted Answer

A) The nonpolar molecules are too large for the space through which they need to pass. 
B) The nonpolar molecules are repelled by the polar water molecules. 
C) The nonpolar molecules have a difficult time getting past the ionic heads of the fatty acid molecules, which are surrounded by water molecules. 
D) Nonpolar molecules tend to bind with the bilipid layer, thus inhibiting their passage. 
A) The nonpolar molecules are too large for the space through which they need to pass. 
B) The nonpolar molecules are repelled by the polar water molecules. 
C) The nonpolar molecules have a difficult time getting past the ionic heads of the fatty acid molecules, which are surrounded by water molecules. 
D) Nonpolar molecules tend to bind with the bilipid layer, thus inhibiting their passage.

Question 10

Which of the following statements describes a saturated solution?

Accepted Answer

A) a solution where the solvent cannot dissolve any more solute 
B) a solution of salt water with salt at the bottom 
C) a carbonated beverage with bubbles 
D) all of the above 
E) none of the above 
A) a solution where the solvent cannot dissolve any more solute 
B) a solution of salt water with salt at the bottom 
C) a carbonated beverage with bubbles 
D) all of the above 
E) none of the above

Question 11

Given the following diagram, describe what happens electronically between these two molecules.

Accepted Answer

A) Oxygen B becomes slightly positively charged due to the electrons on the water molecule. 
B) Oxygen A becomes slightly positively charged due to the electrons on the water molecule. 
C) Oxygen W becomes slightly negatively charged due to the oxygen molecule. 
D) Oxygen W becomes slightly positively charged due to the oxygen molecule. 
E) none of the above 
A) Oxygen B becomes slightly positively charged due to the electrons on the water molecule. 
B) Oxygen A becomes slightly positively charged due to the electrons on the water molecule. 
C) Oxygen W becomes slightly negatively charged due to the oxygen molecule. 
D) Oxygen W becomes slightly positively charged due to the oxygen molecule. 
E) none of the above

Question 12

A soap molecule is ________.

Accepted Answer

A) primarily polar 
B) primarily nonpolar 
C) both polar and nonpolar 
D) a neutral compound 
A) primarily polar 
B) primarily nonpolar 
C) both polar and nonpolar 
D) a neutral compound

Question 13

Which of the following might have the lowest solubility in water?

Accepted Answer

A) CH3OH 
B) Cl2 
C) O2 
D) CH3CH3 
E) none of the above 
A) CH3OH 
B) Cl2 
C) O2 
D) CH3CH3 
E) none of the above

Question 14

In a solution of 77 percent nitrogen and 23 percent oxygen, which is the solvent?

Accepted Answer

A) nitrogen 
B) oxygen 
C) both 
D) neither 
E) Gases cannot form solutions. 
A) nitrogen 
B) oxygen 
C) both 
D) neither 
E) Gases cannot form solutions.

Question 15

If nitrogen,   , were pumped into your lungs at high pressure, what would happen to its solubility in your blood stream?

Accepted Answer

A) The greater the pressure, the greater the solubility. 
B) The greater the pressure, the lower the solubility. 
C) You cannot change solubility of a substance by changing the pressure. 
D) Nitrogen is not soluble in your blood. 
A) The greater the pressure, the greater the solubility. 
B) The greater the pressure, the lower the solubility. 
C) You cannot change solubility of a substance by changing the pressure. 
D) Nitrogen is not soluble in your blood.

Question 16

Which of the above would best describe how soap behaves in water?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) none of the above 
A) a 
B) b 
C) c 
D) d 
E) none of the above

Question 17

How many molecules of sucrose are in a 0.500 moles of sucrose?

Accepted Answer

A) 3.01 × 1023 molecules of sucrose 
B) 6.02 × 1023 molecules of sucrose 
C) 12.04 × 1023 molecules of sucrose 
D) 0.5 
E) 1 gram 
A) 3.01 × 1023 molecules of sucrose 
B) 6.02 × 1023 molecules of sucrose 
C) 12.04 × 1023 molecules of sucrose 
D) 0.5 
E) 1 gram

Question 18

Which of the following molecules is most likely to show a dipole-dipole interaction?

Accepted Answer

A) SO2 
B) CO2 
C) CH4 
D) H-C   C-H 
E) none of the above 
A) SO2 
B) CO2 
C) CH4 
D) H-C   C-H 
E) none of the above

Question 19

The warming of a saturated solution of calcium carbonate, CaCO3, produces ________.

Accepted Answer

A) a precipitate 
B) a clear solution 
C) effervescence 
D) a counter cooling effect 
A) a precipitate 
B) a clear solution 
C) effervescence 
D) a counter cooling effect

Question 20

Which of the following molecules would you expect to be the most strongly attracted to a Cl- ion?

Accepted Answer

A) H-F 
B) H3C-CH3 
C) Cl-Cl 
D) F-F 
E) CCl4 
A) H-F 
B) H3C-CH3 
C) Cl-Cl 
D) F-F 
E) CCl4

The boiling point of 1,4-butanediol is 230°C. Would you expect this compound to be soluble or insoluble in room-temperature water?

A 1 molar solution of sugar water contains ________.

In which of the following molecules will water induce a temporary dipole?

An inventor claims to have developed a new perfume that lasts a long time because it doesn't evaporate. Comment on this claim.

What is the special property of a semipermeable membrane that makes osmosis possible?

Why might sodium carbonate (washing soda, Na₂CO₃)be added to hard water to aid in cleaning?

Which of the following molecules is most likely to show a dipole-dipole interaction?

If the solubility of a compound is 72 grams per liter at a given temperature, how many grams of the compound will dissolve in 0.50 liters at the same temperature?

From the schematic above: why do nonpolar molecules have a difficult time passing through the bilipid layer?

Which of the following statements describes a saturated solution?

Given the following diagram, describe what happens electronically between these two molecules.

A soap molecule is ________.

Which of the following might have the lowest solubility in water?

In a solution of 77 percent nitrogen and 23 percent oxygen, which is the solvent?

If nitrogen, , were pumped into your lungs at high pressure, what would happen to its solubility in your blood stream?

Which of the above would best describe how soap behaves in water?

How many molecules of sucrose are in a 0.500 moles of sucrose?

Which of the following molecules is most likely to show a dipole-dipole interaction?

The warming of a saturated solution of calcium carbonate, CaCO₃, produces ________.

Which of the following molecules would you expect to be the most strongly attracted to a Cl^- ion?

About Science

Particles of Matter

Elements of Chemistry

Subatomic Particles

The Atomic Nucleus

How Atoms Bond

How Water Behaves

How Chemicals React

Acids and Bases in Our Environment

Oxidations and Reductions Charge the World

Organic Compounds

Nutrients of Life

Medicinal Chemistry

Optimizing Food Production

Protection Water and Air Resources

Capturing Energy

Filters

Exam 7: How Molecules Mix

The boiling point of 1,4-butanediol is 230°C. Would you expect this compound to be soluble or insoluble in room-temperature water?

A 1 molar solution of sugar water contains ________.

In which of the following molecules will water induce a temporary dipole?

An inventor claims to have developed a new perfume that lasts a long time because it doesn't evaporate. Comment on this claim.

What is the special property of a semipermeable membrane that makes osmosis possible?

Why might sodium carbonate (washing soda, Na2CO3)be added to hard water to aid in cleaning?

Which of the following molecules is most likely to show a dipole-dipole interaction?

If the solubility of a compound is 72 grams per liter at a given temperature, how many grams of the compound will dissolve in 0.50 liters at the same temperature?

From the schematic above: why do nonpolar molecules have a difficult time passing through the bilipid layer?

Which of the following statements describes a saturated solution?

Given the following diagram, describe what happens electronically between these two molecules.

A soap molecule is ________.

Which of the following might have the lowest solubility in water?

In a solution of 77 percent nitrogen and 23 percent oxygen, which is the solvent?

If nitrogen, , were pumped into your lungs at high pressure, what would happen to its solubility in your blood stream?

Which of the above would best describe how soap behaves in water?

How many molecules of sucrose are in a 0.500 moles of sucrose?

Which of the following molecules is most likely to show a dipole-dipole interaction?

The warming of a saturated solution of calcium carbonate, CaCO3, produces ________.

Which of the following molecules would you expect to be the most strongly attracted to a Cl- ion?

About Science

Particles of Matter

Elements of Chemistry

Subatomic Particles

The Atomic Nucleus

How Atoms Bond

How Water Behaves

How Chemicals React

Acids and Bases in Our Environment

Oxidations and Reductions Charge the World

Organic Compounds

Nutrients of Life

Medicinal Chemistry

Optimizing Food Production

Protection Water and Air Resources

Capturing Energy

Filters

Why might sodium carbonate (washing soda, Na₂CO₃)be added to hard water to aid in cleaning?

The warming of a saturated solution of calcium carbonate, CaCO₃, produces ________.

Which of the following molecules would you expect to be the most strongly attracted to a Cl^- ion?