Chemistry for Changing Times 10th edition

Textbook Cover

John W. Hill and Doris K. Kolb
Publisher: Pearson Education


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  • 1: Chemisty: A Science for All Seasons (9)
  • 2: Atoms: Are They for Real? (6)
  • 3: Atomic Structure: Images of the Invisible (15)
  • 4: Nuclear Chemistry: The Heart of Matter (6)
  • 5: Chemical Bonds: The Ties That Bind (11)
  • 6: Chemical Accounting: Mass and Volume Relationships (15)
  • 7: Acids and Bases: Please Pass the Protons (13)
  • 8: Oxidation and Reduction: Burn and Unburn (12)
  • 9: Organic Chemistry: The Infinite Variety of Carbon Compounds (6)
  • 10: Polymers: Giants Among Molecules (5)
  • 11: Chemistry of Earth: Metals and Minerals (7)
  • 12: Air: The Breath of Life (12)
  • 13: Water: Rivers of Life; Seas of Sorrows (7)
  • 14: Energy: A Fuels Paradise (8)
  • 15: Biochemistry: A Molecular View of Life (8)
  • 16: Food: Those Incredible Edible Chemicals (10)
  • 17: Household Chemicals: Helps and Hazards (8)
  • 18: Fitness and Health: Some Chemical Connections (7)
  • 19: Drugs: Chemical Cures, Comforts, and Cautions (9)
  • 20: Poisons: Chemical Toxicology (11)

Questions Available within WebAssign

Most questions from this textbook are available in WebAssign. The online questions are identical to the textbook questions except for minor wording changes necessary for Web use. Whenever possible, variables, numbers, or words have been randomized so that each student receives a unique version of the question. This list is updated nightly.

Question Group Key
AP - Additional Problem
P - Problem
RQ - Review Question


Question Availability Color Key
BLACK questions are available now
GRAY questions are under development


Group Quantity Questions
Chapter 1: Chemisty: A Science for All Seasons
1.AP 2 068 072
1.P 7 034 038 040 042 044 051 058
Chapter 2: Atoms: Are They for Real?
2.AP 1 042
2.P 5 024 026 030 036 038
Chapter 3: Atomic Structure: Images of the Invisible
3.AP 1 080
3.P 11 032 034 036 042 044 048 050 052 056 058 070
3.RQ 3 010 011 012
Chapter 4: Nuclear Chemistry: The Heart of Matter
4.P 6 039 041 043 045 047 049
Chapter 5: Chemical Bonds: The Ties That Bind
5.P 11 040 042 046 048 050 052 055 057 065 073 082
Chapter 6: Chemical Accounting: Mass and Volume Relationships
6.P 15 020 024 030 032 034 040 042 044 046 054 058 066 068 070 072
Chapter 7: Acids and Bases: Please Pass the Protons
7.P 13 026 028 034 036 038 040 042 044 046 048 050 052 054
Chapter 8: Oxidation and Reduction: Burn and Unburn
8.P 12 018 020 022 024 026 028 029 032 033 035 038 040
Chapter 9: Organic Chemistry: The Infinite Variety of Carbon Compounds
9.P 6 020 026 033 040 056 060
Chapter 10: Polymers: Giants Among Molecules
10.P 3 034 038 042
10.RQ 2 012 016
Chapter 11: Chemistry of Earth: Metals and Minerals
11.P 7 012 030 034 038 040 044 046
Chapter 12: Air: The Breath of Life
12.P 12 018 022 024 026 030 032 034 036 042 044 052 054
Chapter 13: Water: Rivers of Life; Seas of Sorrows
13.P 7 014 016 019 021 023 046 048
Chapter 14: Energy: A Fuels Paradise
14.P 8 008 010 012 016 018 036 042 050
Chapter 15: Biochemistry: A Molecular View of Life
15.P 8 040 042 054 062 066 068 076 078
Chapter 16: Food: Those Incredible Edible Chemicals
16.P 9 031 033 037 039 052 080 082 083 089
16.RQ 1 002
Chapter 17: Household Chemicals: Helps and Hazards
17.AP 2 091 092
17.P 3 038 060 081
17.RQ 3 011 019 024
Chapter 18: Fitness and Health: Some Chemical Connections
18.P 6 044 046 050 052 056 073
18.RQ 1 016
Chapter 19: Drugs: Chemical Cures, Comforts, and Cautions
19.P 5 024 031 043 046 051
19.RQ 4 002 004 009 015
Chapter 20: Poisons: Chemical Toxicology
20.P 9 014 016 018 021 023 028 032 040 041
20.RQ 2 002 009
Total 185