Chemistry (Semester 2) Final Exam
Questions and Answers
a statement that uses chemical formulas to show the identities and relative amounts of
the substances of a chemical reaction - correct answer-chemical equation
a starting substance in a chemical reaction - correct answer-reactant
as the temperature of a gas increases, the pressure also increases if the volume
remains constant - correct answer-gay lussacs law
liquids are less fluid than gases because - correct answer-their intramolectular forces
are stronger
identify the type of chemical reaction shown here- 2C2H6(g) + 7O2 (g) ---> 4CO2(g) +
6H2O(l) - correct answer-combustion
identify the type of chemical reaction shown here- CO2(g) +CaO(s) ---> CaCO3(s) -
correct answer-synthesis
at standard temperature and pressure, one mole of any gas occupies _________ of
space - correct answer-22.4L
identify the type of chemical reaction shown here, 2H20(l) ---> 2H20(l) + O2(g) - correct
answer-decomposition
when the volume of a gas is increased, what happens to the pressure within the gas if
the volume is constant - correct answer-pressure decreases
one atmosphere of pressure is equivalent to - correct answer-101.3kPa
identify the type of chemical reaction shown here- Mg(s) + 2AgNO3(aq) ---> 2Ag(s) +
Mg(NO3)2(aq) - correct answer-single replacement
a reaction in which a compound breaks down into two or more elements of new
compounds - correct answer-decomposition reaction
STP is defined as - correct answer-0K, 101.3kPa
a solid produced during a chemical reaction in a solution - correct answer-precipitate
, the process by which the atoms of one or more substances are rearranged to form
different substances - correct answer-chemical reaction
a reaction in which two or more substances react to produce a single product - correct
answer-synthesis reaction
an equation that shows all of the articles in solution as they actually exist - correct
answer-complete ionic equation
an equation that includes only the particles that participate in the reaction - correct
answer-net ionic equation
an ion that is present but does not participate in a reaction - correct answer-spectator
ion
a substance formed during a chemical reaction - correct answer-product
(?) according to the kinetic molecular theory, the particles which make up a gas - correct
answer-are in constant random motion
gases are typically less dense than solids because - correct answer-of the distance
between its particles
(?) the rate at which a gas diffuses is not affected by - correct answer-the sped of its
particles
according to graham's law of effusion, the rate of effusion for a gas is - correct answer-
inversely related to the square root of the molar mass of the gas
a reaction involving the exchange of positive ions between two compounds dissolved in
water - correct answer-double replacement reaction
when a gas is compressed, its density - correct answer-increases
at elevations above sea level, such as here in Illinois, atmospheric pressure is generally
- correct answer-below one atmosphere
the device used to measure atmospheric pressure is the - correct answer-barometer
a number written in front of a chemical symbol - correct answer-coefficient
hydrogen bonds are types of - correct answer-intermolecular forces
which intermolecular forces would exist between molecules of methane, CH4 - correct
answer-hydrogen bonds
Questions and Answers
a statement that uses chemical formulas to show the identities and relative amounts of
the substances of a chemical reaction - correct answer-chemical equation
a starting substance in a chemical reaction - correct answer-reactant
as the temperature of a gas increases, the pressure also increases if the volume
remains constant - correct answer-gay lussacs law
liquids are less fluid than gases because - correct answer-their intramolectular forces
are stronger
identify the type of chemical reaction shown here- 2C2H6(g) + 7O2 (g) ---> 4CO2(g) +
6H2O(l) - correct answer-combustion
identify the type of chemical reaction shown here- CO2(g) +CaO(s) ---> CaCO3(s) -
correct answer-synthesis
at standard temperature and pressure, one mole of any gas occupies _________ of
space - correct answer-22.4L
identify the type of chemical reaction shown here, 2H20(l) ---> 2H20(l) + O2(g) - correct
answer-decomposition
when the volume of a gas is increased, what happens to the pressure within the gas if
the volume is constant - correct answer-pressure decreases
one atmosphere of pressure is equivalent to - correct answer-101.3kPa
identify the type of chemical reaction shown here- Mg(s) + 2AgNO3(aq) ---> 2Ag(s) +
Mg(NO3)2(aq) - correct answer-single replacement
a reaction in which a compound breaks down into two or more elements of new
compounds - correct answer-decomposition reaction
STP is defined as - correct answer-0K, 101.3kPa
a solid produced during a chemical reaction in a solution - correct answer-precipitate
, the process by which the atoms of one or more substances are rearranged to form
different substances - correct answer-chemical reaction
a reaction in which two or more substances react to produce a single product - correct
answer-synthesis reaction
an equation that shows all of the articles in solution as they actually exist - correct
answer-complete ionic equation
an equation that includes only the particles that participate in the reaction - correct
answer-net ionic equation
an ion that is present but does not participate in a reaction - correct answer-spectator
ion
a substance formed during a chemical reaction - correct answer-product
(?) according to the kinetic molecular theory, the particles which make up a gas - correct
answer-are in constant random motion
gases are typically less dense than solids because - correct answer-of the distance
between its particles
(?) the rate at which a gas diffuses is not affected by - correct answer-the sped of its
particles
according to graham's law of effusion, the rate of effusion for a gas is - correct answer-
inversely related to the square root of the molar mass of the gas
a reaction involving the exchange of positive ions between two compounds dissolved in
water - correct answer-double replacement reaction
when a gas is compressed, its density - correct answer-increases
at elevations above sea level, such as here in Illinois, atmospheric pressure is generally
- correct answer-below one atmosphere
the device used to measure atmospheric pressure is the - correct answer-barometer
a number written in front of a chemical symbol - correct answer-coefficient
hydrogen bonds are types of - correct answer-intermolecular forces
which intermolecular forces would exist between molecules of methane, CH4 - correct
answer-hydrogen bonds
