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WorksheetsReleased Chem Exam Part II
Total questions: 20
Worksheet time: 10mins
A 2.0-liter closed container holds 1.0 mole of an ideal gas at a certain temperature and pressure. Which closed container will hold 3.0 moles of this ideal gas at the same temperature and pressure?
a 3.0-liter container
a 6.0-liter container
a 9.0-liter container
a 12.0-liter container
The sample is in a gaseous state
The sample is in a liquid state.
The sample is at its critical point.
The sample is at its triple point.
What is the approximate temperature of 1.4 moles of a gas with a pressure of 3.25 atmospheres in a 4.738-liter container?
180 K
170 K
150 K
130 K
R
S
T
U
The burning splint was extinguished because of a lack of CO2 in the test tube.
The burning splint was extinguished because of a lack of H2O vapor.
Decomposition produced CO2 and H2O
Combustion produced O2 and H2O
2
3
4
5
0.0308 g
0.0771 g
0.121 g
0.154 g
What is the molecular formula of a compound with the empirical formula CH2O and a molecular mass of 60 g/mol?
CH2O
C2H4O2
C2H4O4
C2H2O2
A chemical reaction occurred because new atoms were created.
A chemical reaction occurred because a new substance was formed.
The popping sound provided evidence that the acid changed physical states.
The popping sound provided evidence that the magnesium atoms were destroyed.
How many O2 particles are in 2.50 moles of O2 at Standard Temperature and Pressure (STP)?
4.15 × 1022 particles
2.41 × 1023 particles
5.02 × 1023 particles
1.51 × 1024 particles
Why does an increase in temperature usually increase the rate of a chemical reaction?
because the activation energy of the reaction increases
because the surface area of reacting particles increases
because the proper orientation of reacting particles improves
because the number of effective collisions between reacting particles increases
heating the flask with a hot plate
placing the flask in an ice bath
removing H2O from the flask
adding CO to the flask
200K
300K
400K
500K
Substances X and Y would react to replace substance W, and the position of equilibrium would shift to the right.
Substances Y and Z would react to replace substance W, and the position of equilibrium would shift to the left.
This would increase pressure, causing only substance Y to replace substance W and shifting the equilibrium to the right.
This would decrease temperature, causing only substance Z to replace substance W and shifting the equilibrium to the left.
A solution has a pOH of 12. Which best describes the solution?
It has a pH of 2 and is a base.
It has a pH of 12 and is a base.
It has a pH of 2 and is an acid.
It has a pH of 12 and is an acid.
A student describes a liquid as feeling slippery. The student places red litmus paper into the liquid, and the paper turns blue. What can the student conclude from these observations?
The substance is likely a nonmetal.
The substance is likely a metal.
The substance is likely a base.
The substance is likely an acid.
0.0982 M
0.637 M
1.36 M
10.2 M
What type of solution is formed when solid sodium hydroxide (NaOH) is dissolved in water?
an electrolytic solution, because NaOH will dissociate into ions
an electrolytic solution, because NaOH will not dissociate into ions
a nonelectrolytic solution, because NaOH will dissociate into ions
a nonelectrolytic solution, because NaOH will not dissociate into ions
suspension
colloid
supersaturated
unsaturated
Which statement explains what happens when potassium chloride (KCl) dissolves in water?
Water molecules surround the potassium chloride but do not exert forces of attraction strong enough to break any bonds.
Water molecules exert forces of attraction that break the potassium chloride apart into potassium ions and chloride ions.
Water molecules exert forces of attraction that break the potassium chloride apart into neutral atoms of potassium and neutral atoms of chlorine.
Water molecules exert forces of attraction that break the potassium chloride apart into potassium atoms and diatomic chlorine gas.
