WGU D425 INTRO TO CHEMISTRY EXAM REVIEW 2026/2027 | HIGH-
YIELD OA QUESTIONS & ANSWERS | KEY CHEMISTRY CONCEPTS |
EXAM-STYLE PRACTICE | LATEST UPDATE
1. The substance you are left with at the END of the chemical reaction is called
the ______
reactant
product
2. If you have a salad with various ingredients like lettuce, tomatoes, and
cucumbers, how would you classify it in terms of mixtures?
Homogeneous mixture
Element
Compound
Heterogeneous mixture
3. What type of energy is associated with the motion of an object?
Kinetic energy
Thermal energy
Chemical energy
Potential energy
4. What is matter?
Something that is magical
Anything that has volume
Anything that is religious
Anything that has mass and takes up space
, 5. Describe the difference between a pure substance and a mixture in terms of
composition.
A pure substance is always a single element, while a mixture is always
a compound.
A pure substance is less stable than a mixture.
A pure substance has a uniform and constant composition, while a
mixture contains two or more substances that can vary in
composition.
A pure substance can be separated into components, while a mixture
cannot.
6. What term is used to describe the particles within an atom, such as protons,
neutrons, and electrons?
Molecules
Atomic nuclei
Subatomic particles
Ions
7. Describe the relationship between kinetic energy and the motion of an
object.
Kinetic energy is the energy associated with temperature changes.
Kinetic energy is the energy released during a chemical reaction.
Kinetic energy is the energy stored in an object at rest.
Kinetic energy is the energy an object possesses due to its motion.
8. Describe the main difference between a mixture and a compound.
YIELD OA QUESTIONS & ANSWERS | KEY CHEMISTRY CONCEPTS |
EXAM-STYLE PRACTICE | LATEST UPDATE
1. The substance you are left with at the END of the chemical reaction is called
the ______
reactant
product
2. If you have a salad with various ingredients like lettuce, tomatoes, and
cucumbers, how would you classify it in terms of mixtures?
Homogeneous mixture
Element
Compound
Heterogeneous mixture
3. What type of energy is associated with the motion of an object?
Kinetic energy
Thermal energy
Chemical energy
Potential energy
4. What is matter?
Something that is magical
Anything that has volume
Anything that is religious
Anything that has mass and takes up space
, 5. Describe the difference between a pure substance and a mixture in terms of
composition.
A pure substance is always a single element, while a mixture is always
a compound.
A pure substance is less stable than a mixture.
A pure substance has a uniform and constant composition, while a
mixture contains two or more substances that can vary in
composition.
A pure substance can be separated into components, while a mixture
cannot.
6. What term is used to describe the particles within an atom, such as protons,
neutrons, and electrons?
Molecules
Atomic nuclei
Subatomic particles
Ions
7. Describe the relationship between kinetic energy and the motion of an
object.
Kinetic energy is the energy associated with temperature changes.
Kinetic energy is the energy released during a chemical reaction.
Kinetic energy is the energy stored in an object at rest.
Kinetic energy is the energy an object possesses due to its motion.
8. Describe the main difference between a mixture and a compound.
