CHEM 120 Final-Exam Study-Guide
Practice Questions
Question 1
Which of the following is considered matter?
A. Light
B. Heat
C. Electricity
D. Water
Answer: D. Water
Rationale: Matter is anything that has mass and takes up space . Light, heat, and
electricity are forms of energy, not matter, because they do not have mass or occupy
space.
Question 2
Which of the following states of matter has a definite shape and definite volume?
A. Solid
B. Liquid
C. Gas
D. Plasma
Answer: A. Solid
Rationale: Solids have both a definite shape and a definite volume. Liquids have a
definite volume but no definite shape, and gases have neither a definite shape nor a
definite volume .
, Question 3
What is the basic unit of matter?
A. Molecule
B. Atom
C. Compound
D. Element
Answer: B. Atom
Rationale: The atom is the basic unit of matter and the smallest particle of an element
that retains its properties .
Measurement & Unit Conversions
Measurement Type Basic Unit
Length Meter (m)
Mass Kilogram (kg)
Volume Liter (L)
Temperature Kelvin (K)
Amount of Substance Mole (mol)
Important Conversions:
1 kg = 2.2 lbs
1 kg = 1000 g
1 g = 1000 mg
1 L = 1000 mL
1 m = 100 cm; 1000 m = 1 km
1 gal = 3.79 L; 0.26 gal = 1 L
, Temperature Conversions:
°F = 32 + 1.8 × °C
K = °C + 273.15
Question 4
What is the normal body temperature in Kelvin?
A. 273 K
B. 298 K
C. 310 K
D. 373 K
Answer: C. 310 K
Rationale: Normal body temperature is 98.6°F or 37°C. To convert from Celsius to
Kelvin: K = °C + 273.15 = 37 + 273.15 = 310.15 K (approximately 310 K) .
Question 5
What is the boiling point of water on the Kelvin scale?
A. 0 K
B. 273 K
C. 310 K
D. 373 K
Answer: D. 373 K
Rationale: Water boils at 100°C, which equals 373 K (100 + 273.15 = 373.15 K) .
Section 2: Atoms, Ions, and Periodic Table
Key Concepts
Practice Questions
Question 1
Which of the following is considered matter?
A. Light
B. Heat
C. Electricity
D. Water
Answer: D. Water
Rationale: Matter is anything that has mass and takes up space . Light, heat, and
electricity are forms of energy, not matter, because they do not have mass or occupy
space.
Question 2
Which of the following states of matter has a definite shape and definite volume?
A. Solid
B. Liquid
C. Gas
D. Plasma
Answer: A. Solid
Rationale: Solids have both a definite shape and a definite volume. Liquids have a
definite volume but no definite shape, and gases have neither a definite shape nor a
definite volume .
, Question 3
What is the basic unit of matter?
A. Molecule
B. Atom
C. Compound
D. Element
Answer: B. Atom
Rationale: The atom is the basic unit of matter and the smallest particle of an element
that retains its properties .
Measurement & Unit Conversions
Measurement Type Basic Unit
Length Meter (m)
Mass Kilogram (kg)
Volume Liter (L)
Temperature Kelvin (K)
Amount of Substance Mole (mol)
Important Conversions:
1 kg = 2.2 lbs
1 kg = 1000 g
1 g = 1000 mg
1 L = 1000 mL
1 m = 100 cm; 1000 m = 1 km
1 gal = 3.79 L; 0.26 gal = 1 L
, Temperature Conversions:
°F = 32 + 1.8 × °C
K = °C + 273.15
Question 4
What is the normal body temperature in Kelvin?
A. 273 K
B. 298 K
C. 310 K
D. 373 K
Answer: C. 310 K
Rationale: Normal body temperature is 98.6°F or 37°C. To convert from Celsius to
Kelvin: K = °C + 273.15 = 37 + 273.15 = 310.15 K (approximately 310 K) .
Question 5
What is the boiling point of water on the Kelvin scale?
A. 0 K
B. 273 K
C. 310 K
D. 373 K
Answer: D. 373 K
Rationale: Water boils at 100°C, which equals 373 K (100 + 273.15 = 373.15 K) .
Section 2: Atoms, Ions, and Periodic Table
Key Concepts
