Question 1

The following three boxes represent the number of submicroscopic particles within a given volume of a particular substance at different temperatures. Which box represents the greatest density? Which box represents the greatest temperature?

Accepted Answer

A) A and C 
B) B and C 
C) A and B 
D) B and A

Question 2

What do members of the Chemical Manufacturers Association pledge in the Responsible Care program?

Accepted Answer

A) The members pledge to manufacture utilizing responsible chemical standards. 
B) The members pledge to manufacture without causing environmental damage. 
C) The members pledge responsible care for all laboratory test animals. 
D) The members pledge responsible care by using only USP grade reagents.

Question 3

Which of the following would not be considered a physical property?

Accepted Answer

A) temperature at which a material catches on fire 
B) color 
C) conductivity 
D) hardness 
E) temperature at which a material melts

Question 4

When liquids change to a solid phase, they

Accepted Answer

A) absorb energy. 
B) release energy. 
C) neither A nor B

Question 5

Which statement best describes a compound?

Accepted Answer

A) a material that is made up of a combination of atoms bonded together 
B) a mixture of more than one element 
C) a mixture of atoms 
D) a material that is made up of a single type of atom 
E) none of the above

Question 6

Which of the following would not be considered matter?

Accepted Answer

A) light 
B) trees 
C) air 
D) clouds 
E) rain

Question 7

To say that evaporation is a cooling process is to say that the

Accepted Answer

A) water left behind cools. 
B) surrounding air cools.

Question 8

Nanotechnology may play an important role in the development of

Accepted Answer

A) space elevators. 
B) windfarms. 
C) bullet proof clothing. 
D) a storage medium for hydrogen fuel. 
E) all of the above

Question 9

How would you describe the size of the following object? a blood cell

Accepted Answer

A) microscopic 
B) macroscopic 
C) submicroscopic 
D) all of the above 
E) none of the above

Question 10

Gases are so much easier to squeeze into smaller volumes than liquids or solids because

Accepted Answer

A) they are so much lighter. 
B) their atoms or molecules are already moving at high speeds. 
C) there is so much space in between the submicroscopic particles. 
D) they are always warmer than liquids or solids.

Question 11

Is chemistry the study of the submicroscopic, the microscopic, or the macroscopic, or all three?

Accepted Answer

A) Submicroscopic, because it deals with atoms and molecules, which can't be seen with a microscope. 
B) Microscopic, because it pertains to the formation of crystals. 
C) Macroscopic, because it deals with powders, liquids, and gases that fill beakers and flasks. 
D) All of the above, because most everything is made of atoms and molecules.

Question 12

Compared to a glass of ice water with ice in it, a glass of plain ice-cold water without ice on a warm day will warm up

Accepted Answer

A) faster. 
B) slower. 
C) in the same amount of time.

Question 13

The systematic names for water, ammonia, and methane are dihydrogen monoxide, H2O; trihydrogen nitride, NH3; and tetrahydrogen carbide, CH4. Why do most people, including chemists, prefer to use the common names for these compounds?

Accepted Answer

A) The common names are shorter and easier to pronounce. 
B) These compounds are encountered frequently. 
C) The common names are more widely known. 
D) all of the above

Question 14

Which of the following would not be considered a chemical property?

Accepted Answer

A) the temperature at which a liquid will boil 
B) light sensitivity 
C) whether a metal will rust or not 
D) whether a material will dissolve in acid or not 
E) the tendency of a material to explode

Question 15

The diagram on the far left shows the moving particles of a gaseous material within a rigid container. Which of the three boxes on the right best represents this material upon the addition of heat?

Accepted Answer

A) Box A, because it shows the gas particles rising upon the addition of heat.  
B) Box B, because it shows the gas particles moving faster. 
C) Box C, because it shows how the particles expand upon the addition of heat. 
D) All three of these boxes show accurate representations of what happens to the particles within this rigid container upon the addition of heat.

Question 16

The molecules of a gas at room temperature move at about

Accepted Answer

A) 1 km/hr. 0.27 m/s. 
B) 10 km/hr. 2.7 m/s. 
C) 150 km/hr. 40.5 m/s. 
D) 500 m/s.

Question 17

How many atoms of Oxygen (O)are in H₃OClO₄?

Accepted Answer

A) 5 
B) 2 
C) 3 
D) 7 
E) 1

Question 18

A solid is not considered fluid because

Accepted Answer

A) of the fixed arrangement of its atoms or molecules. 
B) of the heavy nature of its atoms or molecules. 
C) its atoms or molecules are bound as close together as possible. 
D) its atoms or molecules are under too much pressure.

Question 19

Microtechnology began

Accepted Answer

A) about 60 years ago with the invention of solid state transistors. 
B) in the 1990s with the use of computers. 
C) with the development of micron chemistry in the early 1800s. 
D) at the close of World War II.

Question 20

How many atoms are in one molecule of Na2SO₄?

Accepted Answer

A) 7 
B) 2 
C) 4 
D) 3 
E) 24

Exam 11: Investigating Matter