WGU- INTRO TO CHEMISTRY
NEWEST EXAM||QUESTIONS AND
CORRECT
ANSWERS||GUARANTEED PASS
Protons -CORRECT ANSWER positive charge
The atomic number of an element is the total number of which particles in the nucleus?
-CORRECT ANSWER protons
Electron -CORRECT ANSWER A subatomic particle that has a negative charge
significant figures -CORRECT ANSWER a prescribed decimal place that determines
the amount of rounding off to be done based on the precision of the measurement
mass number -CORRECT ANSWER the sum of the number of neutrons and protons in
an atomic nucleus
amu -CORRECT ANSWER atomic mass unit
average atomic mass formula -CORRECT ANSWER (mass)(%)+(mass)(%)/100 ( % in
decimal)
atomic radius -CORRECT ANSWER the distance from the center of an atom's nucleus
to its outermost electron
Energy level 1 holds how many electrons? -CORRECT ANSWER up to 2 electrons
Energy level 2 holds how many electrons? -CORRECT ANSWER up to 8 electrons
Energy level 3 holds how many electrons? -CORRECT ANSWER up to 18 electrons
Lewis Dot Structure -CORRECT ANSWER diagram of a molecule using dots to
represent valence electrons
polyatomic ions -CORRECT ANSWER groups of atoms with an overall charge
funtional groups -CORRECT ANSWER the components of organic molecules that are
most commonly involved in chemical reactions
Alkane -CORRECT ANSWER a hydrocarbon containing only single covalent bonds
, Alkyne -CORRECT ANSWER carbon-carbon triple bond
Alkene -CORRECT ANSWER double bond, carbon to carbon.
Avogadro's number -CORRECT ANSWER 6.02 x 10^23, the number of atoms or
molecules in 1 mol
molar mass -CORRECT ANSWER the mass of one mole of a pure substance 1:1 ratio
with atomic mass, in g/mol
PV=nRT -CORRECT ANSWER ideal gas law equation
molar volume -CORRECT ANSWER the volume occupied by 1 mole of a gas at
standard temperature and pressure (STP); 22.4 L
any gas at STP has the volume of... -CORRECT ANSWER 22.4L
double replacement reaction -CORRECT ANSWER a chemical change that involves
an exchange of positive ions between two compounds
redox reaction -CORRECT ANSWER A chemical reaction involving the transfer of one
or more electrons from one reactant to another; also called oxidation-reduction reaction.
precipitation reaction -CORRECT ANSWER The formation of a solid from a solution
during a chemical reaction. Precipitates are often formed when two aqueous solutions
are mixed together.
mole to mole ratio -CORRECT ANSWER A ratio made from the coefficient in a
chemical equation (or from the subscripts in a chemical formula).
homogeneous mixture -CORRECT ANSWER A mixture in which substances are
evenly distributed throughout the mixture
heterogeneous mixture -CORRECT ANSWER A mixture in which different materials
can be distinguished easily
1 mole expressed in scientific notation -CORRECT ANSWER 6.022X10^23
CN- -CORRECT ANSWER Cyanide
HCl -CORRECT ANSWER hydrochloric acid
C2H302- -CORRECT ANSWER Acetate
NH4+ -CORRECT ANSWER Ammonium
NEWEST EXAM||QUESTIONS AND
CORRECT
ANSWERS||GUARANTEED PASS
Protons -CORRECT ANSWER positive charge
The atomic number of an element is the total number of which particles in the nucleus?
-CORRECT ANSWER protons
Electron -CORRECT ANSWER A subatomic particle that has a negative charge
significant figures -CORRECT ANSWER a prescribed decimal place that determines
the amount of rounding off to be done based on the precision of the measurement
mass number -CORRECT ANSWER the sum of the number of neutrons and protons in
an atomic nucleus
amu -CORRECT ANSWER atomic mass unit
average atomic mass formula -CORRECT ANSWER (mass)(%)+(mass)(%)/100 ( % in
decimal)
atomic radius -CORRECT ANSWER the distance from the center of an atom's nucleus
to its outermost electron
Energy level 1 holds how many electrons? -CORRECT ANSWER up to 2 electrons
Energy level 2 holds how many electrons? -CORRECT ANSWER up to 8 electrons
Energy level 3 holds how many electrons? -CORRECT ANSWER up to 18 electrons
Lewis Dot Structure -CORRECT ANSWER diagram of a molecule using dots to
represent valence electrons
polyatomic ions -CORRECT ANSWER groups of atoms with an overall charge
funtional groups -CORRECT ANSWER the components of organic molecules that are
most commonly involved in chemical reactions
Alkane -CORRECT ANSWER a hydrocarbon containing only single covalent bonds
, Alkyne -CORRECT ANSWER carbon-carbon triple bond
Alkene -CORRECT ANSWER double bond, carbon to carbon.
Avogadro's number -CORRECT ANSWER 6.02 x 10^23, the number of atoms or
molecules in 1 mol
molar mass -CORRECT ANSWER the mass of one mole of a pure substance 1:1 ratio
with atomic mass, in g/mol
PV=nRT -CORRECT ANSWER ideal gas law equation
molar volume -CORRECT ANSWER the volume occupied by 1 mole of a gas at
standard temperature and pressure (STP); 22.4 L
any gas at STP has the volume of... -CORRECT ANSWER 22.4L
double replacement reaction -CORRECT ANSWER a chemical change that involves
an exchange of positive ions between two compounds
redox reaction -CORRECT ANSWER A chemical reaction involving the transfer of one
or more electrons from one reactant to another; also called oxidation-reduction reaction.
precipitation reaction -CORRECT ANSWER The formation of a solid from a solution
during a chemical reaction. Precipitates are often formed when two aqueous solutions
are mixed together.
mole to mole ratio -CORRECT ANSWER A ratio made from the coefficient in a
chemical equation (or from the subscripts in a chemical formula).
homogeneous mixture -CORRECT ANSWER A mixture in which substances are
evenly distributed throughout the mixture
heterogeneous mixture -CORRECT ANSWER A mixture in which different materials
can be distinguished easily
1 mole expressed in scientific notation -CORRECT ANSWER 6.022X10^23
CN- -CORRECT ANSWER Cyanide
HCl -CORRECT ANSWER hydrochloric acid
C2H302- -CORRECT ANSWER Acetate
NH4+ -CORRECT ANSWER Ammonium
