Question 1

A hypothesis is a _____.

Accepted Answer

A)  concise statement of behavior that is always the same under the same conditions 
B)  set of quantitative data 
C)  tentative explanation or predication based upon experimental observations 
D)  well-tested unifying principle that explains a body of facts 
E)  mathematical formula that models a pattern of behavior 
A)  concise statement of behavior that is always the same under the same conditions 
B)  set of quantitative data 
C)  tentative explanation or predication based upon experimental observations 
D)  well-tested unifying principle that explains a body of facts 
E)  mathematical formula that models a pattern of behavior

Question 2

The element whose symbol is Sn is

Accepted Answer

A)  tin. 
B)  calcium. 
C)  calcium... 
D)  calcium.. 
E)  none of these. 
A)  tin. 
B)  calcium. 
C)  calcium... 
D)  calcium.. 
E)  none of these.

Question 3

Substances like hydrogen (H2) and oxygen (O2) that are composed of only one type of atom are classified as ________.

Accepted Answer

Question 4

Which of the following is an example of qualitative information about a substance?

Accepted Answer

A)  Color of the substance 
B)  Melting temperature of the substance 
C)  Mass of the substance 
D)  Volume of the substance 
E)  Boiling temperature of the substance 
A)  Color of the substance 
B)  Melting temperature of the substance 
C)  Mass of the substance 
D)  Volume of the substance 
E)  Boiling temperature of the substance

Question 5

Which of following would be classified as a chemical change?

Accepted Answer

A)  the transformation of solid carbon dioxide into gaseous carbon dioxide 
B)  the freezing of diesel fuel 
C)  the condensation of nitrogen gas 
D)  the removal of a color stain using bleach 
E)  the evaporation of water 
A)  the transformation of solid carbon dioxide into gaseous carbon dioxide 
B)  the freezing of diesel fuel 
C)  the condensation of nitrogen gas 
D)  the removal of a color stain using bleach 
E)  the evaporation of water

Question 6

A pure substance composed of two or more different elements is a(n) ________.

Accepted Answer

A)  ion 
B)  heterogeneous mixture 
C)  chemical compound 
D)  solid 
E)  solution 
A)  ion 
B)  heterogeneous mixture 
C)  chemical compound 
D)  solid 
E)  solution

Question 7

A mass of 10 g of table salt dissolves in water to form a(n) ________ mixture (i.e., a mixture that is uniform throughout).

Accepted Answer

The answer of A mass of 10 g of table...

Question 8

Which of the following is a heterogeneous mixture?

Accepted Answer

A)  Antifreeze (a mixture of water and ethylene glycol) 
B)  Blood 
C)  Sugar water 
D)  Gasoline 
E)  Vinegar (a mixture of acetic acid and water) 
A)  Antifreeze (a mixture of water and ethylene glycol) 
B)  Blood 
C)  Sugar water 
D)  Gasoline 
E)  Vinegar (a mixture of acetic acid and water)

Question 9

Which of the below figure represents a mixture of two elements?

Accepted Answer

A)  Figure A 
B)  Figure B 
C)  Figure C 
D)  Figure D 
E)  Figure E 
A)  Figure A 
B)  Figure B 
C)  Figure C 
D)  Figure D 
E)  Figure E

Question 10

Which of the following statements is true of a chemical equation?

Accepted Answer

A)  It is a representation of only a physical change rather than a chemical or molecular change. 
B)  It shows that the reactants on the left side of an equation produce the products on the right side of the equation. 
C)  The number of atoms found in the reactants doubles in the products. 
D)  The number of atoms found in the reactants halves in the products. 
E)  The identity of the substance in a chemical equation is preserved. 
A)  It is a representation of only a physical change rather than a chemical or molecular change. 
B)  It shows that the reactants on the left side of an equation produce the products on the right side of the equation. 
C)  The number of atoms found in the reactants doubles in the products. 
D)  The number of atoms found in the reactants halves in the products. 
E)  The identity of the substance in a chemical equation is preserved.

Question 11

To ensure integrity in science, experimental results should be ________ and reported in sufficient detail that the experiment can be repeated by others.

Accepted Answer

The answer of To ensure integrity in science, experimental results...

Question 12

________ energy is the energy associated with the separation of two electrical charges.

Accepted Answer

The answer of ________ energy is the energy associated with...

Question 13

A(n) ________ is a pure substance that is composed of only one type of atom.

Accepted Answer

A)  ion 
B)  solution 
C)  element 
D)  molecule 
E)  gas 
A)  ion 
B)  solution 
C)  element 
D)  molecule 
E)  gas

Question 14

Which one of the following is most likely to be a homogeneous mixture?

Accepted Answer

A)  soil 
B)  blood 
C)  gasoline 
D)  mortar (a mixture of calcium carbonate and sand) 
E)  plain yogurt 
A)  soil 
B)  blood 
C)  gasoline 
D)  mortar (a mixture of calcium carbonate and sand) 
E)  plain yogurt

Question 15

Which one of the following substances is classified as a chemical compound?

Accepted Answer

A)  Ir 
B)  He 
C)  Ho 
D)  HI 
E)  In 
A)  Ir 
B)  He 
C)  Ho 
D)  HI 
E)  In

Question 16

Which one of the following statements is correct?

Accepted Answer

A)  A pure substance may be separated by filtration or distillation into two or more components. 
B)  A heterogeneous mixture is also known as a solution. 
C)  A heterogeneous mixture is composed of two or more substances in the same phase. 
D)  The composition is uniform throughout a homogeneous mixture. 
E)  The combination of a liquid and a solid always results in a heterogeneous mixture. 
A)  A pure substance may be separated by filtration or distillation into two or more components. 
B)  A heterogeneous mixture is also known as a solution. 
C)  A heterogeneous mixture is composed of two or more substances in the same phase. 
D)  The composition is uniform throughout a homogeneous mixture. 
E)  The combination of a liquid and a solid always results in a heterogeneous mixture.

Question 17

Which of the below figures represents a homogeneous mixture?

Accepted Answer

A)  Figure E 
B)  Figure A 
C)  Figure B 
D)  Figure C 
E)  Figure D 
A)  Figure E 
B)  Figure A 
C)  Figure B 
D)  Figure C 
E)  Figure D

Question 18

A(n) ________ is the smallest particle of an element that retains the characteristic chemical properties of that element.

Accepted Answer

The answer of A(n) ________ is the smallest particle of...

Question 19

Which of the following statements concerning green chemistry is not correct?

Accepted Answer

A)  It is better to prevent waste than to treat or clean up waste after it is formed. 
B)  Synthetic methods should be designed to use and generate substances that possess little or no toxicity to human health or the environment. 
C)  Substances used in a chemical process should pose minimal risk for accidents. 
D)  Raw materials should be renewable whenever technically and economically practical. 
E)  Chemical syntheses should be done at extremely high temperatures to ensure harmful bacteria are destroyed. 
A)  It is better to prevent waste than to treat or clean up waste after it is formed. 
B)  Synthetic methods should be designed to use and generate substances that possess little or no toxicity to human health or the environment. 
C)  Substances used in a chemical process should pose minimal risk for accidents. 
D)  Raw materials should be renewable whenever technically and economically practical. 
E)  Chemical syntheses should be done at extremely high temperatures to ensure harmful bacteria are destroyed.

Question 20

Properties, such as color and density, which can be observed or measured without changing the composition of a substance are called ________ properties.

Accepted Answer

The answer of Properties, such as color and density, which...

Exam 1: Basic Concepts of Chemistry

A hypothesis is a _____.

The element whose symbol is Sn is

Substances like hydrogen (H2) and oxygen (O2) that are composed of only one type of atom are classified as ________.

Which of the following is an example of qualitative information about a substance?

Which of following would be classified as a chemical change?

A pure substance composed of two or more different elements is a(n) ________.

A mass of 10 g of table salt dissolves in water to form a(n) ________ mixture (i.e., a mixture that is uniform throughout).

Which of the following is a heterogeneous mixture?

Which of the below figure represents a mixture of two elements?

Which of the following statements is true of a chemical equation?

To ensure integrity in science, experimental results should be ________ and reported in sufficient detail that the experiment can be repeated by others.

________ energy is the energy associated with the separation of two electrical charges.

A(n) ________ is a pure substance that is composed of only one type of atom.

Which one of the following is most likely to be a homogeneous mixture?

Which one of the following substances is classified as a chemical compound?

Which one of the following statements is correct?

Which of the below figures represents a homogeneous mixture?

A(n) ________ is the smallest particle of an element that retains the characteristic chemical properties of that element.

Which of the following statements concerning green chemistry is not correct?

Properties, such as color and density, which can be observed or measured without changing the composition of a substance are called ________ properties.

Lets Review: the Tools of Quantitative Chemistry

Atoms, Molecules, and Ions

Chemical Reactions

Stoichiometry: Quantitative Information About Chemical Reactions

Principles of Chemical Reactivity: Energy and Chemical Reactions

The Structure of Atoms

The Structure of Atoms and Periodic Trends

Bonding and Molecular Structure

Bonding and Molecular Structure Orbital Hybridization and Molecular Orbitals

Gases and Their Properties

Intermolecular Forces and Liquids

The Solid State

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Chemical Reactivity: Equilibria

Principles of Chemical Reactivity: the Chemistry of Acids and Bases

Principles of Chemical Reactivity: Other Aspects of Aqueous Equilibria

Principles of Chemical Reactivity: Entropy and Free Energy

Principles of Chemical Reactivity: Electron Transfer Reactions

Environmental Chemistry: Earths Environment, Energy, and Sustainability

The Chemistry of the Main Group Elements

The Chemistry of the Transition Elements

Carbon: Not Just Another Element

Biochemistry

Nuclear Chemistry

Filters

Substances like hydrogen (H₂) and oxygen (O₂) that are composed of only one type of atom are classified as ________.