CHEM 103
Final Exam 2026/2027 | Practice Questions, Answers &
Detailed Rationales | Chemistry Final Review
Resource Features
➢ CHEM 103 Final Exam practice questions
➢ 2026/2027-focused review
➢ Detailed answers
➢ Step-by-step rationales
➢ Calculation-based questions
, CHEM 103 Final Exam 2026/2027 | Practice
Questions, Answers & Detailed Rationales |
Chemistry Final Review
Question 1:
Which of the following is an example of a physical property?
• a. Ability to change color
• b. Flammability
• c. Density
• d. Solubility
Answer: c. Density
Rationale: Physical properties are characteristics that can be
observed or measured without changing the substance's chemical
identity. Density is a physical property because it describes the
mass per unit volume of a substance and can be measured
without altering the chemical composition. Flammability is a
chemical property (requires combustion), solubility involves
chemical interactions, and color change often indicates a chemical
reaction.
,Question 2:
Which of the following is evidence of a chemical change?
• a. Releasing bubbles of gas
• b. Floating in water
• c. Crystallization
• d. Vaporization
• e. None of the above
Answer: a. Releasing bubbles of gas
Rationale: The release of gas bubbles (effervescence) typically
indicates a chemical change, as new gaseous products are being
formed. This is often seen in acid-base reactions or
decomposition reactions. Floating, crystallization, and
vaporization are physical changes that do not alter the chemical
composition of the substance.
Question 3:
According to the metric system, 1 m = 0.001 what?
• a. cm
• b. mm
, • c. dm
• d. km
• e. None of the above
Answer: d. km
Rationale: 1 kilometer = 1000 meters, so 1 meter = 1/1000
kilometer = 0.001 km. This demonstrates the relationship between
metric prefixes: kilo- means 1000, so a kilometer is 1000 times
larger than a meter. Therefore, 1 m is equal to 0.001 km.
Section 2: Scientific Notation and Significant
Figures
Question 4:
Subtract 9.0 × 10³ sec from 2.0 × 10⁴ sec and express the answer
in scientific notation.
• a. 1.1 × 10¹ sec
• b. 1.1 × 10² sec
• c. 1.1 × 10³ sec
• d. 1.1 × 10⁴ sec
• e. 1.1 × 10⁵ sec
Final Exam 2026/2027 | Practice Questions, Answers &
Detailed Rationales | Chemistry Final Review
Resource Features
➢ CHEM 103 Final Exam practice questions
➢ 2026/2027-focused review
➢ Detailed answers
➢ Step-by-step rationales
➢ Calculation-based questions
, CHEM 103 Final Exam 2026/2027 | Practice
Questions, Answers & Detailed Rationales |
Chemistry Final Review
Question 1:
Which of the following is an example of a physical property?
• a. Ability to change color
• b. Flammability
• c. Density
• d. Solubility
Answer: c. Density
Rationale: Physical properties are characteristics that can be
observed or measured without changing the substance's chemical
identity. Density is a physical property because it describes the
mass per unit volume of a substance and can be measured
without altering the chemical composition. Flammability is a
chemical property (requires combustion), solubility involves
chemical interactions, and color change often indicates a chemical
reaction.
,Question 2:
Which of the following is evidence of a chemical change?
• a. Releasing bubbles of gas
• b. Floating in water
• c. Crystallization
• d. Vaporization
• e. None of the above
Answer: a. Releasing bubbles of gas
Rationale: The release of gas bubbles (effervescence) typically
indicates a chemical change, as new gaseous products are being
formed. This is often seen in acid-base reactions or
decomposition reactions. Floating, crystallization, and
vaporization are physical changes that do not alter the chemical
composition of the substance.
Question 3:
According to the metric system, 1 m = 0.001 what?
• a. cm
• b. mm
, • c. dm
• d. km
• e. None of the above
Answer: d. km
Rationale: 1 kilometer = 1000 meters, so 1 meter = 1/1000
kilometer = 0.001 km. This demonstrates the relationship between
metric prefixes: kilo- means 1000, so a kilometer is 1000 times
larger than a meter. Therefore, 1 m is equal to 0.001 km.
Section 2: Scientific Notation and Significant
Figures
Question 4:
Subtract 9.0 × 10³ sec from 2.0 × 10⁴ sec and express the answer
in scientific notation.
• a. 1.1 × 10¹ sec
• b. 1.1 × 10² sec
• c. 1.1 × 10³ sec
• d. 1.1 × 10⁴ sec
• e. 1.1 × 10⁵ sec
