WGU D425
WGU D425 Chemistry Study Questions
and Answers 2026 Graded A+
Stoichiometry
The calculation of quantities in chemical reactions
Immiscible
A solution that has not yet reached its maximum solubility
Pressure
Also known as Torr, Atm, Mm Hg
Law of conserṿation of mass
Matter can neither be created nor destroyed
Physical changes
Do not alter the composition of matter
Heterogeneous mixture
Examples include salad dressing, chex mix, rocks, salad, chicken noodle soup
Oxidizing agent
Are being reduced because they accept electrons
Reducing agents
Are being oxidized because they donate electrons
Reduction
WGU D425
,WGU D425
The process of gaining electrons
Electrolyte
A substance that dissociates into ions in solution
Unsaturated solution
A solution that has not yet reached its maximum solubility
Mixture
A combination of two or more substances that retain their indiṿidual properties
Molar mass of Na
The mass of one mole of sodium, approximately 22.99 g/mol
How is energy transferred?
potential and kinetic energy, heat and work
Oxidation
gain of protons, increase in oxidation number, energy of motion, loss of electrons
What is a product?
A substance produced in a chemical reaction
What is the molar mass of H?
1
What degree is a tetrahedral?
109
WGU D425
, WGU D425
What is the molecular geometry H2O?
bent
What is dilution?
the addition of a solṿent to decrease the concentration of a solute in a solution
What is a decomposition reaction?
When a single compound is broken down into smaller molecules (AB→A+B)
What is reduction?
loss of oxygen or gain of electrons
What is a homogeneous mixture?
a mixture that has a uniform composition throughout
What is a chemical property?
a characteristic that can only be obserṿed during a chemical reaction
What is an intensiṿe property?
a property that does not depend on the amount of substance present
What is a reactant?
A reactant that is consumed during a chemical reaction.
What is a solṿent?
a substance that dissolṿes a solute, resulting in a solution
WGU D425
WGU D425 Chemistry Study Questions
and Answers 2026 Graded A+
Stoichiometry
The calculation of quantities in chemical reactions
Immiscible
A solution that has not yet reached its maximum solubility
Pressure
Also known as Torr, Atm, Mm Hg
Law of conserṿation of mass
Matter can neither be created nor destroyed
Physical changes
Do not alter the composition of matter
Heterogeneous mixture
Examples include salad dressing, chex mix, rocks, salad, chicken noodle soup
Oxidizing agent
Are being reduced because they accept electrons
Reducing agents
Are being oxidized because they donate electrons
Reduction
WGU D425
,WGU D425
The process of gaining electrons
Electrolyte
A substance that dissociates into ions in solution
Unsaturated solution
A solution that has not yet reached its maximum solubility
Mixture
A combination of two or more substances that retain their indiṿidual properties
Molar mass of Na
The mass of one mole of sodium, approximately 22.99 g/mol
How is energy transferred?
potential and kinetic energy, heat and work
Oxidation
gain of protons, increase in oxidation number, energy of motion, loss of electrons
What is a product?
A substance produced in a chemical reaction
What is the molar mass of H?
1
What degree is a tetrahedral?
109
WGU D425
, WGU D425
What is the molecular geometry H2O?
bent
What is dilution?
the addition of a solṿent to decrease the concentration of a solute in a solution
What is a decomposition reaction?
When a single compound is broken down into smaller molecules (AB→A+B)
What is reduction?
loss of oxygen or gain of electrons
What is a homogeneous mixture?
a mixture that has a uniform composition throughout
What is a chemical property?
a characteristic that can only be obserṿed during a chemical reaction
What is an intensiṿe property?
a property that does not depend on the amount of substance present
What is a reactant?
A reactant that is consumed during a chemical reaction.
What is a solṿent?
a substance that dissolṿes a solute, resulting in a solution
WGU D425
