WGU D425 INTRODUCTION TO CHEMISTRY
OA 107 FULL SOLUTION STUDY GUIDE
◉ Density.
Answer: Mass per unit volume of a substance
Density=Mass/Volume
◉ Average atomic mass.
Answer: Weighted average mass of isotopes of an element
sum of all values(atomic mass of isootope * decimal abundance)
◉ Classes of chemical reactions.
Answer: Categories of reactions: synthesis, decomposition, single
replacement, double replacement, combustion, redox
◉ Synthesis reaction.
Answer: a reaction in which two or more substances combine to
form a new compound
◉ Decomposition Reaction.
Answer: AB --> A + B
, A single compound breaks down into two or more simpler
substances
◉ Single Replacement.
Answer: A + BC --> B + AC
one element replaces another element in a compound
◉ Double Replacement.
Answer: AB + CD --> AD + CB
a chemical reaction where two elements in different compounds
trade places
◉ Combustion Reaction.
Answer: a chemical reaction that occurs when a substance reacts
with oxygen, releasing energy in the form of heat and light
◉ Redox Reaction.
Answer: A chemical reaction involving the transfer of one or more
electrons from one reactant to another; also called oxidation-
reduction reaction.
◉ Naming Conventions.
Answer: Rules for naming covalent, ionic, and acidic compounds
OA 107 FULL SOLUTION STUDY GUIDE
◉ Density.
Answer: Mass per unit volume of a substance
Density=Mass/Volume
◉ Average atomic mass.
Answer: Weighted average mass of isotopes of an element
sum of all values(atomic mass of isootope * decimal abundance)
◉ Classes of chemical reactions.
Answer: Categories of reactions: synthesis, decomposition, single
replacement, double replacement, combustion, redox
◉ Synthesis reaction.
Answer: a reaction in which two or more substances combine to
form a new compound
◉ Decomposition Reaction.
Answer: AB --> A + B
, A single compound breaks down into two or more simpler
substances
◉ Single Replacement.
Answer: A + BC --> B + AC
one element replaces another element in a compound
◉ Double Replacement.
Answer: AB + CD --> AD + CB
a chemical reaction where two elements in different compounds
trade places
◉ Combustion Reaction.
Answer: a chemical reaction that occurs when a substance reacts
with oxygen, releasing energy in the form of heat and light
◉ Redox Reaction.
Answer: A chemical reaction involving the transfer of one or more
electrons from one reactant to another; also called oxidation-
reduction reaction.
◉ Naming Conventions.
Answer: Rules for naming covalent, ionic, and acidic compounds
