Question 1

Which of the following lists contains only forms of kinetic energy?

Accepted Answer

A)  electrostatic,gravitational,and mechanical energy 
B)  gravitational,mechanical,and electrical energy 
C)  thermal,acoustic,and mechanical energy 
D)  chemical,thermal,and acoustic energy 
E)  gravitational,chemical,and electrostatic energy 
A)  electrostatic,gravitational,and mechanical energy 
B)  gravitational,mechanical,and electrical energy 
C)  thermal,acoustic,and mechanical energy 
D)  chemical,thermal,and acoustic energy 
E)  gravitational,chemical,and electrostatic energy C

Question 2

What is the correct symbol for potassium?

Accepted Answer

A)  P 
B)  Pm 
C)  K 
D)  Pt 
E)  Po 
A)  P 
B)  Pm 
C)  K 
D)  Pt 
E)  Po C

Question 3

Which of the following observations is/are examples of chemical change?
1)Iron (Fe)rusts,forming Fe2O3.
2)The density of water increases when it changes from a solid to a liquid.
3)Sodium chloride melts at 801$^{\circ}$C.

Accepted Answer

A)  1 only 
B)  2 only 
C)  3 only 
D)  1 and 2 
E)  2 and 3 
A)  1 only 
B)  2 only 
C)  3 only 
D)  1 and 2 
E)  2 and 3 A

Question 4

All of the following statements concerning green chemistry are correct EXCEPT

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 be chosen to minimize the potential for chemical accidents. 
D)  raw materials should be renewable whenever technically and economically practical. 
E)  chemical syntheses should be done at high enough 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 be chosen to minimize the potential for chemical accidents. 
D)  raw materials should be renewable whenever technically and economically practical. 
E)  chemical syntheses should be done at high enough temperatures to ensure harmful bacteria are destroyed.

Question 5

Of the following types of energy,which is/are classified as potential energy?
1) mechanical
2) electrostatic
3) chemical

Accepted Answer

A)  1 only 
B)  2 only 
C)  3 only 
D)  2 and 3 
E)  1,2,and 3 
A)  1 only 
B)  2 only 
C)  3 only 
D)  2 and 3 
E)  1,2,and 3

Question 6

Which term best describes methane,CH4?

Accepted Answer

A)  homogeneous mixture 
B)  ion 
C)  element 
D)  chemical compound 
E)  atom 
A)  homogeneous mixture 
B)  ion 
C)  element 
D)  chemical compound 
E)  atom

Question 7

Which of the following is $\underline{\text{not  }}$  a correct name-symbol combination?

Accepted Answer

A)  vanadium,V 
B)  silicon,Si 
C)  aluminum,Al 
D)  copper,Cu 
E)  potassium,Ge 
A)  vanadium,V 
B)  silicon,Si 
C)  aluminum,Al 
D)  copper,Cu 
E)  potassium,Ge

Question 8

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

Accepted Answer

The answer of Substances like hydrogen (H2) and oxygen (O2)...

Question 9

Which of the following observations is/are examples of physical change?
1)The density of water decreases when it solidifies.
2)Aluminum melts when heated above 660$^{\circ}$C.
3)Hydrogen peroxide (H2O2)decomposes to water and oxygen.

Accepted Answer

A)  1 only 
B)  2 only 
C)  3 only 
D)  1 and 2 
E)  1,2,and 3 
A)  1 only 
B)  2 only 
C)  3 only 
D)  1 and 2 
E)  1,2,and 3

Question 10

What is the name of the element with the symbol B?

Accepted Answer

A)  barium 
B)  beryllium 
C)  bismuth 
D)  boron 
E)  bromine 
A)  barium 
B)  beryllium 
C)  bismuth 
D)  boron 
E)  bromine

Question 11

What kind of change is depicted below?

Accepted Answer

A)  both chemical and physical change 
B)  chemical change 
C)  no change 
D)  physical change 
A)  both chemical and physical change 
B)  chemical change 
C)  no change 
D)  physical change

Question 12

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 an...

Question 13

Which one of the following statements is not a comparison of physical properties?

Accepted Answer

A)  Mercury and gallium are both liquids at 50$^{\circ}$C. 
B)  Oxygen is more soluble in water than helium. 
C)  Silver and gold are malleable metals. 
D)  Oxygen and nitrogen are both liquids at -200$^{\circ}$C. 
E)  Calcium dissolves more quickly than iron in acids. 
A)  Mercury and gallium are both liquids at 50$^{\circ}$C. 
B)  Oxygen is more soluble in water than helium. 
C)  Silver and gold are malleable metals. 
D)  Oxygen and nitrogen are both liquids at -200$^{\circ}$C. 
E)  Calcium dissolves more quickly than iron in acids.

Question 14

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

Accepted Answer

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

Question 15

Which one of the following is most likely to be a $\underline{\text{heterogeneous mixture}}$?

Accepted Answer

A)  table salt dissolved in water 
B)  soil 
C)  antifreeze (a mixture of water and ethylene glycol) 
D)  sugar water 
E)  gasoline 
A)  table salt dissolved in water 
B)  soil 
C)  antifreeze (a mixture of water and ethylene glycol) 
D)  sugar water 
E)  gasoline

Question 16

Which of following would be classified as a $\underline{\text{  chemical }}$  change?

Accepted Answer

A)  the condensation of nitrogen gas 
B)  the dissolution of sugar in water 
C)  the melting of gold 
D)  the tarnishing of the surface of copper in the presence of oxygen 
E)  the transformation of solid carbon dioxide into gaseous carbon dioxide 
A)  the condensation of nitrogen gas 
B)  the dissolution of sugar in water 
C)  the melting of gold 
D)  the tarnishing of the surface of copper in the presence of oxygen 
E)  the transformation of solid carbon dioxide into gaseous carbon dioxide

Question 17

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 18

Density is an example of a(n)________ property,which is one that does not depend on the amount of a substance.

Accepted Answer

The answer of Density is an example of a(n)________ property,which...

Question 19

A battery-operated power tool,such as a cordless drill,converts

Accepted Answer

A)  electrostatic energy to chemical potential energy. 
B)  mechanical energy to electrostatic energy. 
C)  thermal energy to mechanical energy. 
D)  thermal energy to gravitational energy. 
E)  chemical potential energy to mechanical energy. 
A)  electrostatic energy to chemical potential energy. 
B)  mechanical energy to electrostatic energy. 
C)  thermal energy to mechanical energy. 
D)  thermal energy to gravitational energy. 
E)  chemical potential energy to mechanical energy.

Question 20

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

Exam 1: Basic Concepts of Chemistry

Which of the following lists contains only forms of kinetic energy?

What is the correct symbol for potassium?

Which of the following observations is/are examples of chemical change? 1)Iron (Fe)rusts,forming Fe2O3. 2)The density of water increases when it changes from a solid to a liquid. 3)Sodium chloride melts at 801 ∘^{\circ}∘ C.

All of the following statements concerning green chemistry are correct EXCEPT

Of the following types of energy,which is/are classified as potential energy? 1) mechanical 2) electrostatic 3) chemical

Which term best describes methane,CH4?

Which of the following is not ‾\underline{\text{not }}not ​ a correct name-symbol combination?

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

Which of the following observations is/are examples of physical change? 1)The density of water decreases when it solidifies. 2)Aluminum melts when heated above 660 ∘^{\circ}∘ C. 3)Hydrogen peroxide (H2O2)decomposes to water and oxygen.

What is the name of the element with the symbol B?

What kind of change is depicted below?

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

Which one of the following statements is not a comparison of physical properties?

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

Which one of the following is most likely to be a heterogeneous mixture‾\underline{\text{heterogeneous mixture}}heterogeneous mixture​ ?

Which of following would be classified as a chemical ‾\underline{\text{ chemical }} chemical ​ change?

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

Density is an example of a(n)________ property,which is one that does not depend on the amount of a substance.

A battery-operated power tool,such as a cordless drill,converts

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

Mathlets 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 Chemistry of Solids

Solutions and Their Behavior

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Reactivity: Chemical Equilibria

The Chemistry of Acids and Bases

Principles of Reactivity: Other Aspects of Aqueous Equilibria

Entropy and Free Energy

Principles of 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

Which of the following observations is/are examples of chemical change? 1)Iron (Fe)rusts,forming Fe₂O₃. 2)The density of water increases when it changes from a solid to a liquid. 3)Sodium chloride melts at 801 $^{\circ}$ C.

Which term best describes methane,CH₄?

Which of the following is $\underline{\text{not }}$ a correct name-symbol combination?

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

Which of the following observations is/are examples of physical change? 1)The density of water decreases when it solidifies. 2)Aluminum melts when heated above 660 $^{\circ}$ C. 3)Hydrogen peroxide (H₂O₂)decomposes to water and oxygen.

Which one of the following is most likely to be a $\underline{\text{heterogeneous mixture}}$ ?

Which of following would be classified as a $\underline{\text{ chemical }}$ change?