CHEM 162 EXAM PRACTICE STUDY
A sample of Argon gas has a volume of 735mL at a pressure of 1.20 atm and
temperature of 300K. What is the pressure of the gas if its volume and temperature is
changed to 900mL and 200K? - Correct Answers -C.0.653
In a solution of 5.0g sugar and 100.0g water, water is the: - Correct Answers -A.solvent
Pressure exerted by the vapor when it is in dynamic equilibrium with its liquid is called: -
Correct Answers -vapor pressure
A 3.76 g sample of a noble gas is stored in a 2.00 L vessel at 874 torr and 25°C. What
is the noble gas? - Correct Answers -Ar
Which of the following substances is not a solution? - Correct Answers -oxygen
The vapor pressure of water at 20.0°C is 17.5 mm Hg . If the pressure of a gas collected
over water was measured to be 453.0 mm Hg. What is the pressure of the pure gas? -
Correct Answers -0.573 atm
The reaction between H2 gas and propene gas to produce propane gas includes a
nickel catalyst at 25oC. This is an example of a _______________ catalysis - Correct
Answers -heterogeneous
A barometer uses mercury because: - Correct Answers -the density of mercury is very
large which allows the barometer to be short
Two liquids , A and B, are placed in two separate closed containers. When the vapor
and liquid have established equilibrium in the containers, the vapor pressure of A is
higher than that of B. - Correct Answers -A is more volatile than B
the solid state is defined as having no definite shape or volume - Correct Answers -
False
Why does the rate of the reaction decrease over time? - Correct Answers -As the
reaction proceeds, a decrease in the concentration of reactants results in fewer
successful collisions.
A substance that has strong intermolecular forces will probably be ______________ at
room temperature - Correct Answers -solid
, Calculate the molar mass of a gas that effuses at a rate 0.633 times O2 - Correct
Answers -80
How many calories does it take to vaporize 50.0g of benzene at its boiling point? use
table 44.2 Voyce text - Correct Answers -C.4720 cal
Pressure exerted on the earth by air particles, describes: - Correct Answers -
atmospheric pressure
How many moles of gas were added to a balloon that started with 2.3 moles of gas and
a volume of 1.4L given that the final volume was 7.2L? - Correct Answers -9.5
The pressure of a gas is 1216 mmHg. What is its pressure in atm? - Correct Answers -
1.6 atm
Increasing the pressure of a gas above a liquid, increases its solublity in the liquid -
Correct Answers -True
115 grams of H2SO4 is dissolved in 500.0mL of water. What is the Normality of the
resulting solution? (assume all H+ enter the solution) - Correct Answers -4.7
O2 gas at 25oC has pressure of 1.1 atm has density of: - Correct Answers -1.4 g/L
For the reaction: H3PO4 + NaOH → H2O + Na2HPO4 (balanced?) calculate the
equivalent weight of H3PO4. - Correct Answers -49
A substance that has weak intermolecular forces will probably be ______________ at
room temperature - Correct Answers -gas
How many grams of NaCl is needed to prepare 500.0g of a 3.2m solution? - Correct
Answers -78
How many grams of CaCl2 is needed to prepare 150.0 mL of a 3.2M CaCl2 solution? -
Correct Answers -53
What is the molar mass of a gas that has a density of 0.179 g/L at STP? - Correct
Answers -4
500mL of a gas at 25.0oC will have a volume of 1.20L at: - Correct Answers -442 oC
Comparing a reaction with a catalyst to the same reaction without the catalyst, each of
the following statements is true EXCEPT - Correct Answers -The uncatalyzed reaction
has a smaller value for the equilibrium constant.
At 25oC O2(g) has greater solubility in water than at 40oC. - Correct Answers -True
A sample of Argon gas has a volume of 735mL at a pressure of 1.20 atm and
temperature of 300K. What is the pressure of the gas if its volume and temperature is
changed to 900mL and 200K? - Correct Answers -C.0.653
In a solution of 5.0g sugar and 100.0g water, water is the: - Correct Answers -A.solvent
Pressure exerted by the vapor when it is in dynamic equilibrium with its liquid is called: -
Correct Answers -vapor pressure
A 3.76 g sample of a noble gas is stored in a 2.00 L vessel at 874 torr and 25°C. What
is the noble gas? - Correct Answers -Ar
Which of the following substances is not a solution? - Correct Answers -oxygen
The vapor pressure of water at 20.0°C is 17.5 mm Hg . If the pressure of a gas collected
over water was measured to be 453.0 mm Hg. What is the pressure of the pure gas? -
Correct Answers -0.573 atm
The reaction between H2 gas and propene gas to produce propane gas includes a
nickel catalyst at 25oC. This is an example of a _______________ catalysis - Correct
Answers -heterogeneous
A barometer uses mercury because: - Correct Answers -the density of mercury is very
large which allows the barometer to be short
Two liquids , A and B, are placed in two separate closed containers. When the vapor
and liquid have established equilibrium in the containers, the vapor pressure of A is
higher than that of B. - Correct Answers -A is more volatile than B
the solid state is defined as having no definite shape or volume - Correct Answers -
False
Why does the rate of the reaction decrease over time? - Correct Answers -As the
reaction proceeds, a decrease in the concentration of reactants results in fewer
successful collisions.
A substance that has strong intermolecular forces will probably be ______________ at
room temperature - Correct Answers -solid
, Calculate the molar mass of a gas that effuses at a rate 0.633 times O2 - Correct
Answers -80
How many calories does it take to vaporize 50.0g of benzene at its boiling point? use
table 44.2 Voyce text - Correct Answers -C.4720 cal
Pressure exerted on the earth by air particles, describes: - Correct Answers -
atmospheric pressure
How many moles of gas were added to a balloon that started with 2.3 moles of gas and
a volume of 1.4L given that the final volume was 7.2L? - Correct Answers -9.5
The pressure of a gas is 1216 mmHg. What is its pressure in atm? - Correct Answers -
1.6 atm
Increasing the pressure of a gas above a liquid, increases its solublity in the liquid -
Correct Answers -True
115 grams of H2SO4 is dissolved in 500.0mL of water. What is the Normality of the
resulting solution? (assume all H+ enter the solution) - Correct Answers -4.7
O2 gas at 25oC has pressure of 1.1 atm has density of: - Correct Answers -1.4 g/L
For the reaction: H3PO4 + NaOH → H2O + Na2HPO4 (balanced?) calculate the
equivalent weight of H3PO4. - Correct Answers -49
A substance that has weak intermolecular forces will probably be ______________ at
room temperature - Correct Answers -gas
How many grams of NaCl is needed to prepare 500.0g of a 3.2m solution? - Correct
Answers -78
How many grams of CaCl2 is needed to prepare 150.0 mL of a 3.2M CaCl2 solution? -
Correct Answers -53
What is the molar mass of a gas that has a density of 0.179 g/L at STP? - Correct
Answers -4
500mL of a gas at 25.0oC will have a volume of 1.20L at: - Correct Answers -442 oC
Comparing a reaction with a catalyst to the same reaction without the catalyst, each of
the following statements is true EXCEPT - Correct Answers -The uncatalyzed reaction
has a smaller value for the equilibrium constant.
At 25oC O2(g) has greater solubility in water than at 40oC. - Correct Answers -True
