Chemistry 130 – Arizona College of Nursing
Midterm Exam Study Guide 119 Practice
Questions with Correct Answers & Explanations
Latest 2026-2028 Update
Introduction
This study guide provides 119 practice questions and answers for the Chemistry 130
Midterm Exam at Arizona College of Nursing. The exam covers essential chemistry
concepts including:
Matter & Measurement – Classification of matter, SI units, significant figures,
scientific notation, density calculations
Atomic Structure – Protons, neutrons, electrons, isotopes, atomic number, mass
number
Periodic Table – Groups/periods, metals/nonmetals/metalloids, periodic trends
(atomic radius, ionization energy)
Chemical Bonding – Ionic bonds, covalent bonds, metallic bonds, Lewis structures,
octet rule
, Chemical Reactions – Types of reactions (synthesis, decomposition, single/double
replacement), balancing equations
States of Matter & Gas Laws – Boyle's law, Charles's law, combined gas law, ideal
gas law
Solutions & Acid-Base Chemistry – Solubility, molarity, pH, buffers, neutralization
SECTION 1: MATTER & MEASUREMENT (Questions 1-25)
1. Matter is defined as:
A. Anything that has weight
B. Anything that has mass and occupies space
C. The amount of substance in an object
D. The gravitational force acting on an object
Rationale: Matter is anything that has mass and occupies space (volume). Mass is the
amount of matter in an object, and weight is the gravitational force acting on an object .
2. Mass is best defined as:
A. A measurement of the amount of matter in an object
B. A measurement of the gravitational force acting on an object
C. The space an object occupies
D. The density of an object
Rationale: Mass is a measurement of the amount of matter in an object. It is different
from weight, which is the gravitational force acting on an object .
,3. Weight is best defined as:
A. A measurement of the amount of matter in an object
B. A measurement of the gravitational force acting on an object
C. The space an object occupies
D. The mass of an object
Rationale: Weight is a measurement of the gravitational force acting on an object.
Weight depends on gravity, while mass is constant regardless of location .
4. Physical changes are characterized by:
A. Changes matter undergoes without changing composition
B. Changes that involve changes in composition
C. The formation of new substances
D. Irreversible changes only
Rationale: Physical changes are changes matter undergoes without changing its
chemical composition. Examples include melting, boiling, and dissolving .
5. Chemical changes are characterized by:
A. Changes matter undergoes without changing composition
B. Changes matter undergoes that involve changes in composition
C. Changes that are always reversible
D. Changes that only affect physical state
, Rationale: Chemical changes involve changes in the chemical composition of matter,
resulting in the formation of new substances .
6. Physical properties are properties that:
A. Can be observed or measured without trying to change the composition of the
matter being studied
B. Require a chemical reaction to observe
C. Only involve reactivity with other substances
D. Are always extensive properties
Rationale: Physical properties can be observed or measured without changing the
composition of the matter. Examples include color, density, melting point, and boiling point .
7. Chemical properties are properties that:
A. Can be observed without changing composition
B. Matter demonstrates when attempts are made to change into new substances
C. Include color and density
D. Are always intensive properties
Rationale: Chemical properties describe how matter behaves when it undergoes
chemical changes. They are observed when attempts are made to change the substance
into new substances .
8. The SI base unit for length is the:
Midterm Exam Study Guide 119 Practice
Questions with Correct Answers & Explanations
Latest 2026-2028 Update
Introduction
This study guide provides 119 practice questions and answers for the Chemistry 130
Midterm Exam at Arizona College of Nursing. The exam covers essential chemistry
concepts including:
Matter & Measurement – Classification of matter, SI units, significant figures,
scientific notation, density calculations
Atomic Structure – Protons, neutrons, electrons, isotopes, atomic number, mass
number
Periodic Table – Groups/periods, metals/nonmetals/metalloids, periodic trends
(atomic radius, ionization energy)
Chemical Bonding – Ionic bonds, covalent bonds, metallic bonds, Lewis structures,
octet rule
, Chemical Reactions – Types of reactions (synthesis, decomposition, single/double
replacement), balancing equations
States of Matter & Gas Laws – Boyle's law, Charles's law, combined gas law, ideal
gas law
Solutions & Acid-Base Chemistry – Solubility, molarity, pH, buffers, neutralization
SECTION 1: MATTER & MEASUREMENT (Questions 1-25)
1. Matter is defined as:
A. Anything that has weight
B. Anything that has mass and occupies space
C. The amount of substance in an object
D. The gravitational force acting on an object
Rationale: Matter is anything that has mass and occupies space (volume). Mass is the
amount of matter in an object, and weight is the gravitational force acting on an object .
2. Mass is best defined as:
A. A measurement of the amount of matter in an object
B. A measurement of the gravitational force acting on an object
C. The space an object occupies
D. The density of an object
Rationale: Mass is a measurement of the amount of matter in an object. It is different
from weight, which is the gravitational force acting on an object .
,3. Weight is best defined as:
A. A measurement of the amount of matter in an object
B. A measurement of the gravitational force acting on an object
C. The space an object occupies
D. The mass of an object
Rationale: Weight is a measurement of the gravitational force acting on an object.
Weight depends on gravity, while mass is constant regardless of location .
4. Physical changes are characterized by:
A. Changes matter undergoes without changing composition
B. Changes that involve changes in composition
C. The formation of new substances
D. Irreversible changes only
Rationale: Physical changes are changes matter undergoes without changing its
chemical composition. Examples include melting, boiling, and dissolving .
5. Chemical changes are characterized by:
A. Changes matter undergoes without changing composition
B. Changes matter undergoes that involve changes in composition
C. Changes that are always reversible
D. Changes that only affect physical state
, Rationale: Chemical changes involve changes in the chemical composition of matter,
resulting in the formation of new substances .
6. Physical properties are properties that:
A. Can be observed or measured without trying to change the composition of the
matter being studied
B. Require a chemical reaction to observe
C. Only involve reactivity with other substances
D. Are always extensive properties
Rationale: Physical properties can be observed or measured without changing the
composition of the matter. Examples include color, density, melting point, and boiling point .
7. Chemical properties are properties that:
A. Can be observed without changing composition
B. Matter demonstrates when attempts are made to change into new substances
C. Include color and density
D. Are always intensive properties
Rationale: Chemical properties describe how matter behaves when it undergoes
chemical changes. They are observed when attempts are made to change the substance
into new substances .
8. The SI base unit for length is the:
