D425 WGU things to know Test with 100%
Correct Solutions
% By Mass - ANSWER Mass percentage of a component in a mixture
g of part/ g of whole * 100%
% by Volume - ANSWER Volume percentage of a component in a solution
formula: mL of part/mL of whole * 100
= mL of solute/mL of solute + solution *100
% by mass/volume - ANSWER Mass percentage of a solute in a volume of solution
Formula: g of solute/mL of whole *100
Molarity - ANSWER Concentration of a solution in moles of solute per liter of solution
mole of solute/total volume of solute+ mL of solvent
Dilution Formula - ANSWER C1V1 = C2V2; initial concentration x initial volume = final
concentration x final volume
Metric prefixes - ANSWER Units used to indicate multiples or fractions of base units in
the metric system
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
naming covalent compounds - ANSWER Name of 1st and 2nd element add a prefix to
indicate the number of atoms:1-mono, 2-di, 3-tri, 4-tetra, 5-penta, 6-hexa, 7-hepta, 8-
octa, 9-nona, 10-deca
Correct Solutions
% By Mass - ANSWER Mass percentage of a component in a mixture
g of part/ g of whole * 100%
% by Volume - ANSWER Volume percentage of a component in a solution
formula: mL of part/mL of whole * 100
= mL of solute/mL of solute + solution *100
% by mass/volume - ANSWER Mass percentage of a solute in a volume of solution
Formula: g of solute/mL of whole *100
Molarity - ANSWER Concentration of a solution in moles of solute per liter of solution
mole of solute/total volume of solute+ mL of solvent
Dilution Formula - ANSWER C1V1 = C2V2; initial concentration x initial volume = final
concentration x final volume
Metric prefixes - ANSWER Units used to indicate multiples or fractions of base units in
the metric system
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
naming covalent compounds - ANSWER Name of 1st and 2nd element add a prefix to
indicate the number of atoms:1-mono, 2-di, 3-tri, 4-tetra, 5-penta, 6-hexa, 7-hepta, 8-
octa, 9-nona, 10-deca
