WGU D425 Chemistry Study
Questions and Answers
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 conservation 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
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 individual
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
What is the molecular geometry H2O?
bent
What is dilution?
Questions and Answers
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 conservation 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
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 individual
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
What is the molecular geometry H2O?
bent
What is dilution?
