Question 1

Complete the following sentence. A theory is

Accepted Answer

A)  a tentative explanation for a set of observations that can be tested by further experimentation. 
B) a statement describing a relationship between phenomena that is always the same under the same conditions. 
C)  a unifying principle that explains a body of facts and relations. 
D)  a model used to visualize the invisible. 
A)  a tentative explanation for a set of observations that can be tested by further experimentation. 
B) a statement describing a relationship between phenomena that is always the same under the same conditions. 
C)  a unifying principle that explains a body of facts and relations. 
D)  a model used to visualize the invisible.

Question 2

A person weighs 150.0 lb, and the correct dosage of a drug is given as 1.50 mg per kilogram of body weight. How many milligrams of the drug should be given (2.20 lb = 1 kg)

Accepted Answer

A)  115 mg 
B)  112 mg 
C)  108 mg 
D)  102 mg 
E)  None of the above 
A)  115 mg 
B)  112 mg 
C)  108 mg 
D)  102 mg 
E)  None of the above

Question 3

What are the three states of matter

Accepted Answer

A)  Compound, element, mixture 
B)  Compound, solid, liquid 
C)  Solid, liquid, element 
D)  Solid, liquid, gas 
E)  Solid, liquid, compound 
A)  Compound, element, mixture 
B)  Compound, solid, liquid 
C)  Solid, liquid, element 
D)  Solid, liquid, gas 
E)  Solid, liquid, compound

Question 4

You just measured a sugar cube and obtained the following information: 
mass = 3.48 g
Height = length = width = 1.3 cm
Determine the volume and density of the cube. Suppose the sugar cube was added to a cup of water. Before it dissolves, will the sugar cube float or sink to the bottom

Accepted Answer

A)  Volume of the sugar cube = 2.4 cm3; density of the sugar cube = 1.6 g/cm3 ; float 
B)  Volume of the sugar cube = 2.2 cm3; density of the sugar cube = 1.6 g/cm3 ; sink 
C)  Volume of the sugar cube = 2.2 cm3; density of the sugar cube = 1.4 g/cm3 ; sink 
D) None of these choices has the volume, density and sink or float decision reported correctly 
A)  Volume of the sugar cube = 2.4 cm3; density of the sugar cube = 1.6 g/cm3 ; float 
B)  Volume of the sugar cube = 2.2 cm3; density of the sugar cube = 1.6 g/cm3 ; sink 
C)  Volume of the sugar cube = 2.2 cm3; density of the sugar cube = 1.4 g/cm3 ; sink 
D) None of these choices has the volume, density and sink or float decision reported correctly

Question 5

Give the correct number of significant figures and units to the problem below. 58.00 mg - 45.22 µg =

Accepted Answer

A)  57.95 mg 
B)  12.78 mg 
C)  12.78 µg 
D)  57.55 µg 
E)  12.78 mg2 
A)  57.95 mg 
B)  12.78 mg 
C)  12.78 µg 
D)  57.55 µg 
E)  12.78 mg2

Question 6

Mass is an intensive property.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following does not represent a chemical change

Accepted Answer

A)  a freshly cut apple turns brown 
B)  milk turns sour on standing at room temperature 
C)  when cooled to 0$\circ$C, liquid water becomes ice 
D)  frying an egg 
E)  fermentation of sugar to alcohol 
A)  a freshly cut apple turns brown 
B)  milk turns sour on standing at room temperature 
C)  when cooled to 0$\circ$C, liquid water becomes ice 
D)  frying an egg 
E)  fermentation of sugar to alcohol

Question 8

The SI prefixes mega and deci represent, respectively:

Accepted Answer

A)  103 and 10-2 
B)  106 and 10-1 
C)  10-3 and 10-2 
D)  10-6 and 102 
E)  102 and 10-3 
A)  103 and 10-2 
B)  106 and 10-1 
C)  10-3 and 10-2 
D)  10-6 and 102 
E)  102 and 10-3

Question 9

The number 9.64000 * 105 contains six significant figures.

Accepted Answer

A) True 
 B)False

Question 10

Of the following which is NOT an example of a mixture

Accepted Answer

A)  gasoline 
B)  sea water 
C)  iron 
D)  air 
E)  sand 
A)  gasoline 
B)  sea water 
C)  iron 
D)  air 
E)  sand

Question 11

A particular flask has a mass of 17.4916 g when empty. When filled with ordinary water at 20.0$\circ$C (density = 0.9982 g/mL), the mass of the flask is now 43.9616 g. The density of so-called "heavy water" at 20.0$\circ$C is 1.1053 g/mL. What will the mass of the flask be when filled with heavy water at 20.0$\circ$C

Accepted Answer

A)  29.2573 g 
B)  46.8016 g 
C)  46.7489 g 
D)  29.3100 g 
E)  43.9140 g 
A)  29.2573 g 
B)  46.8016 g 
C)  46.7489 g 
D)  29.3100 g 
E)  43.9140 g

Question 12

Give the correct number of significant figures to the problem below.5.80 x 10-1 - 3.4 x 10-2 =

Accepted Answer

A)  5.5 x 10-1 
B)  5.46 x 10-1 
C)  2.4 x 10-3 
D)  2.4 x 102 
E)  5.5 x 10-2 
A)  5.5 x 10-1 
B)  5.46 x 10-1 
C)  2.4 x 10-3 
D)  2.4 x 102 
E)  5.5 x 10-2

Question 13

Calculate the mass of the air contained in a room that measures 2.50 m * 5.50 m * 3.00 m (density of air = 1.29 g/dm3 at 25$\circ$C).

Accepted Answer

A)  3.13 * 10-5 g 
B)  32.0 kg 
C)  53.2 kg 
D)  53.2 g 
E)  None of the above. 
A)  3.13 * 10-5 g 
B)  32.0 kg 
C)  53.2 kg 
D)  53.2 g 
E)  None of the above.

Question 14

How many significant figures does the result of the following operation contain
8.52010 * 7.90

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  5 
E)  6 
A)  2 
B)  3 
C)  4 
D)  5 
E)  6

Question 15

Lead melts at 601.0$\circ$C. What temperature is this in $\circ$F

Accepted Answer

A)  302$\circ$F 
B)  365$\circ$F 
C)  1,050$\circ$F 
D)  1,082$\circ$F 
E)  1,114$\circ$F 
A)  302$\circ$F 
B)  365$\circ$F 
C)  1,050$\circ$F 
D)  1,082$\circ$F 
E)  1,114$\circ$F

Question 16

An aluminum beverage can contain 12.0 fluid ounces of liquid. Express this volume in liters. 1 fl oz = 29.6 mL)

Accepted Answer

A)  4.07 * 10-2 L 
B)  0.355 L 
C)  0.407 L 
D)  2.46 L 
E)  3.55 * 102 L 
A)  4.07 * 10-2 L 
B)  0.355 L 
C)  0.407 L 
D)  2.46 L 
E)  3.55 * 102 L

Question 17

Give the correct number of significant figures to the problem below.2.4 x 10-4 + 3.1 x 10-2 =

Accepted Answer

A) 5.5 x 10-6 
B) 5.5 x 10-8 
C) 5.5 x 10-4 
D)  3.1 x 10-2 
E)  2.4 x 10-4 
A) 5.5 x 10-6 
B) 5.5 x 10-8 
C) 5.5 x 10-4 
D)  3.1 x 10-2 
E)  2.4 x 10-4

Question 18

A spherical vessel (diameter = 2.00 cm) when empty has a mass of 2.00 g. What is the greatest volume of water that can be placed in the vessel and still have the vessel float at the surface of water (Given: density of water = 1.00 g/cm3)

Accepted Answer

A)  2.00 mL 
B)  31.5 mL 
C)  2.19 mL 
D)  4.19 mL 
E)  the vessel will not float even when empty 
A)  2.00 mL 
B)  31.5 mL 
C)  2.19 mL 
D)  4.19 mL 
E)  the vessel will not float even when empty

Question 19

Give the correct number of significant figures and units to the problem below. 4.5 m / 8.52 m =

Accepted Answer

A)  0.528 m 
B)  0.53 m 
C)  0.53 m2 
D)  0.53 
E)  0.528 m2 
A)  0.528 m 
B)  0.53 m 
C)  0.53 m2 
D)  0.53 
E)  0.528 m2

Question 20

A pure yellow crystalline substance, when heated in a vacuum, releases a greenish gas and a red powder. Is the original yellow crystalline substance a compound

Accepted Answer

A) True 
 B)False

Exam 1: Chemistry: The Study of Change

Complete the following sentence. A theory is

A person weighs 150.0 lb, and the correct dosage of a drug is given as 1.50 mg per kilogram of body weight. How many milligrams of the drug should be given (2.20 lb = 1 kg)

What are the three states of matter

You just measured a sugar cube and obtained the following information: mass = 3.48 g Height = length = width = 1.3 cm Determine the volume and density of the cube. Suppose the sugar cube was added to a cup of water. Before it dissolves, will the sugar cube float or sink to the bottom

Give the correct number of significant figures and units to the problem below. 58.00 mg - 45.22 µg =

Mass is an intensive property.

Which of the following does not represent a chemical change

The SI prefixes mega and deci represent, respectively:

The number 9.64000 * 105 contains six significant figures.

Of the following which is NOT an example of a mixture

Give the correct number of significant figures to the problem below.5.80 x 10-1 - 3.4 x 10-2 =

Calculate the mass of the air contained in a room that measures 2.50 m * 5.50 m * 3.00 m (density of air = 1.29 g/dm3 at 25 ∘\circ∘ C).

How many significant figures does the result of the following operation contain 8.52010 * 7.90

Lead melts at 601.0 ∘\circ∘ C. What temperature is this in ∘\circ∘ F

An aluminum beverage can contain 12.0 fluid ounces of liquid. Express this volume in liters. 1 fl oz = 29.6 mL)

Give the correct number of significant figures to the problem below.2.4 x 10-4 + 3.1 x 10-2 =

A spherical vessel (diameter = 2.00 cm) when empty has a mass of 2.00 g. What is the greatest volume of water that can be placed in the vessel and still have the vessel float at the surface of water (Given: density of water = 1.00 g/cm3)

Give the correct number of significant figures and units to the problem below. 4.5 m / 8.52 m =

A pure yellow crystalline substance, when heated in a vacuum, releases a greenish gas and a red powder. Is the original yellow crystalline substance a compound

Atoms Molecules and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Hybridization of Atomic

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metals Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

The number 9.64000 * 10⁵ contains six significant figures.

Give the correct number of significant figures to the problem below.5.80 x 10^-1 - 3.4 x 10^-2 =

Calculate the mass of the air contained in a room that measures 2.50 m * 5.50 m * 3.00 m (density of air = 1.29 g/dm³ at 25^$\circ$C).

Lead melts at 601.0^$\circ$C. What temperature is this in ^$\circ$F

Give the correct number of significant figures to the problem below.2.4 x 10^-4 + 3.1 x 10^-2 =

A spherical vessel (diameter = 2.00 cm) when empty has a mass of 2.00 g. What is the greatest volume of water that can be placed in the vessel and still have the vessel float at the surface of water (Given: density of water = 1.00 g/cm³)