Week 5: Stoichiometry Part 2 Flashcards
The percent by mass of each element in a compound
percent abundance
an elemental formula showing the lowest whole-number ratio of the elements in a compound
empirical formula
A formula showing how many atoms of each element are present in one molecule of a molecular compound
molecular formula
The letters a, b, c, and d where A and B are reactants, and C and D are products; indicate relative amounts of reactants and products
stoichiometric coefficient
an equation where the number of atoms of each element on the reactant side is equal to the number of atoms on the product side
balanced chemical equation
chemical reactions are described using ____
chemical equations
reaction where two or more chemical species combine to produce a single new compound
combination reaction
reaction where a single chemical species breaks down to produce two or more new chemical species
decomposition reaction
Occurs when one chemical species (often a single element) replaces a portion of another compound to produce two new products
single replacement reaction
Occurs when the cations from the original two ionic compounds trade anions to make two new ionic compounds
double replacement reaction
An equation that shows all ionic components as neutral compounds, but the ones that are dissolved in water are denoted with “(aq).”
molecular equation
A chemical equation in which the various reaction components are represented as they actually exist in the reaction, for example, as individual ions.
ionic equation
Ions that are present in solution but do not participate in the overall reaction
spectator ion
The simplified ionic equation in which all of the spectator ions are cancelled out
net ionic equation
occurs when a hydrocarbon reacts in the presence of oxygen to produce water and carbon dioxide.
combustion
