Full Test Bank - Chemistry In Focus: A Molecular View Of
Our World 7th Edition, By Nivaldo J. Tro With All
Chapter 1-19/ Latest Version With Verified Answers
,chapter 1. molecular reasons ------------------------------------------------------------------------------------- 3
chapter 2. the chemist's toolbox ------------------------------------------------------------------------------- 26
chapter 3. atoms and elements -------------------------------------------------------------------------------- 39
chapter 4. molecules, compounds, and chemical reactions --------------------------------------------- 51
chapter 5. chemical bonding ------------------------------------------------------------------------------------ 64
chapter 6. organic chemistry ------------------------------------------------------------------------------------ 76
chapter 7. light and color ---------------------------------------------------------------------------------------- 90
chapter 8. nuclear chemistry ---------------------------------------------------------------------------------- 100
chapter 9. energy for today ----------------------------------------------------------------------------------- 112
chapter 10. energy for tomorrow: solar and other renewable energy sources ------------------ 122
chapter 11. the air around us --------------------------------------------------------------------------------- 133
chapter 12. the liquids and solids around us: especially water -------------------------------------- 145
chapter 13. acids and bases: the molecules responsible for sour and bitter---------------------- 157
chapter 14. oxidation and reduction ------------------------------------------------------------------------ 168
chapter 15. the chemistry of household products ------------------------------------------------------- 179
chapter 16. biochemistry and biotechnology ------------------------------------------------------------- 189
chapter 17. drugs and medicine: healing, helping, and hurting ------------------------------------- 201
chapter 18. the chemistry of food --------------------------------------------------------------------------- 212
chapter 19. nanotechnology ---------------------------------------------------------------------------------- 223
,chapter 1. molecular reasons
chemistry in focus: a molecular view of our world 7th edition, test bank
multiple choice
1. which of these is the best definition of matter?
a. the pull of gravity on an object.
b. anything that has weight and volume.
c. anything that has mass and occupies space.
d. anything that is directly proportional to weight.
e. the measure of the amount of space an object occupies.
answer: c
matter is defined as anything that has mass and occupies space. mass is a measure of the
amount of matter in an object, while space refers to the volume it takes up. weight, on
the other hand, depends on gravity, so it is not a reliable measure of matter.
pts: 1 ref: p. 3
2. which of these statements is correct?
a. the amount of carbon on earth is essentially constant.
b. the amount of carbon on earth fluctuates with the seasons.
c. the amount of carbon on earth is increasing due to plant and animal growth.
d. the amount of carbon on earth is decreasing due to consumption of carbon-based fuels.
e. both b and c are correct.
answer: a
the law of conservation of mass tells us that matter is neither created nor destroyed in
chemical reactions. therefore, the total amount of carbon on earth remains constant; it
only changes form between compounds such as co₂, carbohydrates, and hydrocarbons.
pts: 1 ref: p. 5
3. the french chemist antoine lavoisier found that the weight of objects before burning and
the weight of the products after burning were equal. he concluded that the total weight
did not change during a process. which of these best describes lavoisier's conclusion?
a. from observation, lavoisier created a scientific law.
b. from observation, lavoisier created a scientific theory.
c. from scientific law, lavoisier created a scientific theory.
d. from experimentation, lavoisier created a scientific law.
e. from observation, lavoisier created a scientific conclusion.
answer: a
lavoisier’s experiments led to the law of conservation of mass, a scientific law derived
, from repeated observations that mass is constant during chemical changes. laws
summarize consistent patterns in data rather than explaining why they occur.
pts: 1 ref: p. 6
4. when using the scientific method, before experiments are done a ________ should be
established.
a. hypothesis
b. law
c. theory
d. conclusion
answer: a
a hypothesis is a tentative explanation or prediction made before conducting experiments.
it guides the experimental design and provides a statement that can be tested and either
supported or refuted by data.
pts: 1 ref: p. 8
5. a statement which summarizes the data obtained from a series of observations is known
as a(n) ________.
a. observation
b. law
c. theory
d. conclusion
e. experiment
answer: b
a scientific law summarizes consistent results or relationships observed in nature, often
expressed mathematically. unlike a theory, it does not attempt to explain the
underlying cause of the observed behavior.
pts: 1 ref: p. 8
6. which of these is not part of the scientific method?
a. observation
b. law
c. theory
d. conclusion
e. experiment
answer: d
the major components of the scientific method include observation, hypothesis formation,
experimentation, theory, and law. “conclusion” is a general term that may appear in
experiment reports but is not formally considered one of the stages in the scientific
method.
pts: 1 ref: p. 7
Our World 7th Edition, By Nivaldo J. Tro With All
Chapter 1-19/ Latest Version With Verified Answers
,chapter 1. molecular reasons ------------------------------------------------------------------------------------- 3
chapter 2. the chemist's toolbox ------------------------------------------------------------------------------- 26
chapter 3. atoms and elements -------------------------------------------------------------------------------- 39
chapter 4. molecules, compounds, and chemical reactions --------------------------------------------- 51
chapter 5. chemical bonding ------------------------------------------------------------------------------------ 64
chapter 6. organic chemistry ------------------------------------------------------------------------------------ 76
chapter 7. light and color ---------------------------------------------------------------------------------------- 90
chapter 8. nuclear chemistry ---------------------------------------------------------------------------------- 100
chapter 9. energy for today ----------------------------------------------------------------------------------- 112
chapter 10. energy for tomorrow: solar and other renewable energy sources ------------------ 122
chapter 11. the air around us --------------------------------------------------------------------------------- 133
chapter 12. the liquids and solids around us: especially water -------------------------------------- 145
chapter 13. acids and bases: the molecules responsible for sour and bitter---------------------- 157
chapter 14. oxidation and reduction ------------------------------------------------------------------------ 168
chapter 15. the chemistry of household products ------------------------------------------------------- 179
chapter 16. biochemistry and biotechnology ------------------------------------------------------------- 189
chapter 17. drugs and medicine: healing, helping, and hurting ------------------------------------- 201
chapter 18. the chemistry of food --------------------------------------------------------------------------- 212
chapter 19. nanotechnology ---------------------------------------------------------------------------------- 223
,chapter 1. molecular reasons
chemistry in focus: a molecular view of our world 7th edition, test bank
multiple choice
1. which of these is the best definition of matter?
a. the pull of gravity on an object.
b. anything that has weight and volume.
c. anything that has mass and occupies space.
d. anything that is directly proportional to weight.
e. the measure of the amount of space an object occupies.
answer: c
matter is defined as anything that has mass and occupies space. mass is a measure of the
amount of matter in an object, while space refers to the volume it takes up. weight, on
the other hand, depends on gravity, so it is not a reliable measure of matter.
pts: 1 ref: p. 3
2. which of these statements is correct?
a. the amount of carbon on earth is essentially constant.
b. the amount of carbon on earth fluctuates with the seasons.
c. the amount of carbon on earth is increasing due to plant and animal growth.
d. the amount of carbon on earth is decreasing due to consumption of carbon-based fuels.
e. both b and c are correct.
answer: a
the law of conservation of mass tells us that matter is neither created nor destroyed in
chemical reactions. therefore, the total amount of carbon on earth remains constant; it
only changes form between compounds such as co₂, carbohydrates, and hydrocarbons.
pts: 1 ref: p. 5
3. the french chemist antoine lavoisier found that the weight of objects before burning and
the weight of the products after burning were equal. he concluded that the total weight
did not change during a process. which of these best describes lavoisier's conclusion?
a. from observation, lavoisier created a scientific law.
b. from observation, lavoisier created a scientific theory.
c. from scientific law, lavoisier created a scientific theory.
d. from experimentation, lavoisier created a scientific law.
e. from observation, lavoisier created a scientific conclusion.
answer: a
lavoisier’s experiments led to the law of conservation of mass, a scientific law derived
, from repeated observations that mass is constant during chemical changes. laws
summarize consistent patterns in data rather than explaining why they occur.
pts: 1 ref: p. 6
4. when using the scientific method, before experiments are done a ________ should be
established.
a. hypothesis
b. law
c. theory
d. conclusion
answer: a
a hypothesis is a tentative explanation or prediction made before conducting experiments.
it guides the experimental design and provides a statement that can be tested and either
supported or refuted by data.
pts: 1 ref: p. 8
5. a statement which summarizes the data obtained from a series of observations is known
as a(n) ________.
a. observation
b. law
c. theory
d. conclusion
e. experiment
answer: b
a scientific law summarizes consistent results or relationships observed in nature, often
expressed mathematically. unlike a theory, it does not attempt to explain the
underlying cause of the observed behavior.
pts: 1 ref: p. 8
6. which of these is not part of the scientific method?
a. observation
b. law
c. theory
d. conclusion
e. experiment
answer: d
the major components of the scientific method include observation, hypothesis formation,
experimentation, theory, and law. “conclusion” is a general term that may appear in
experiment reports but is not formally considered one of the stages in the scientific
method.
pts: 1 ref: p. 7
