Chemistry Semester 2 Exam 2024

Last updated 3 months ago

41 questions

Instructions

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Library

Chemistry Semester 2 Exam 2024

Last updated 3 months ago

41 questions

Instructions

Answer each question to the best of your ability. There is only one correct answer to each. Use the following charts to help you along your way. You may also use a calculator.

1

10

8

Draggable item		Corresponding Item

1

3

As you move to the right in the Periodic Table, electronegativity __________ and as you go down the columns, it __________. Column __________ is not included in the trend for electronegativity because these elements don't usually form bonds.

4

When sodium (Na) forms an ion, it __________ an electron and has a __________ charge. It does this in order to achieve __________ valence electron(s) and form a(n) __________ bond.

5

Other Answer Choices:

2

0

1

combustion

3

decomposition

double replacement

synthesis

single replacement

3

The balanced equation for the decomposition of sodium azide is:
______ NaN3 --> ______ Na + ______ N2

Other Answer Choices:

0

3

1

2

6

In the following equations, use Le Chatelier's Principle to determine whether the reaction will shift right, left, or no shift.
N2(g) + 3H2(g) ⇌ 2NH3(g) + heat
Stress                                Shift  . 
add N2                                               __________
remove H2                     __________
increase temperature __________
decrease pressure       __________
add a catalyst               __________
remove NH3                  __________

2

Other Answer Choices:

3

Determine how the following actions will affect reaction rate by choosing the correct response.
a. Platinum is used in catalytic converters in cars to convert toxic gases to carbon dioxide and water. If much less platinum is used to make the catalytic converter, the conversion of the gases would__________
b. Magnesium metal is reacted with hot water in two beakers to produce magnesium hydroxide and hydrogen gas. Beaker 1 had a one-inch strip of magnesium and beaker 2 has a one-inch strip cut into tiny pieces. The rate of reaction in beaker 2 is __________ beaker 1.
c. An experiment is carried out at 40oC and 70oC. The experiment carried out at 70oC occurs faster. This is because __________

1

6

7

1

2

Answer each question to the best of your ability. There is only one correct answer to each. Use the following charts to help you along your way. You may also use a calculator.

Use the diagram to answer the following question.

How many bonds are made by each carbon atom in the molecule shown above?

four

three

two

one

Two elements in a molecule have the same electronegativity values. Which of the following most likely holds the elements together and why?

an ionic bond, because electrons transfer from one element to the other

a polar covalent bond, because the elements do not share electrons equally

a nonpolar covalent bond, because the elements share electrons equally

an intermolecular force, because the elements do not form a chemical bond

Categorize the following items as being either endothermic or exothermic.

solution feels hot
melting of water
photosynthesis
solution feels cold
Bonds Breaking
condensation of water
combustion
Bond Formation

Endothermic
Exothermic

Match the element to the correct number of valence electrons

Draggable item		Corresponding Item
Fr (Francium)		8
S (Sulfur)		2
Ca (Calcium)		5
As (Arsenic)		1
I (Iodine)		6
Kr (Kypton)		4
C (Carbon)		7

In the molecule below, which atom has the largest partial negative charge __________?

C

I

Cl

F

As you move to the right in the Periodic Table, electronegativity __________ and as you go down the columns, it __________. Column __________ is not included in the trend for electronegativity because these elements don't usually form bonds.

When sodium (Na) forms an ion, it __________ an electron and has a __________ charge. It does this in order to achieve __________ valence electron(s) and form a(n) __________ bond.

Balance the following equation, and identify its type.
______ AgNO3(aq) + ______ Cu(s) --> ______ Cu(NO3)2(aq) + ______ Ag(s)
 It is a(n) _______________________ reaction.

Other Answer Choices:

2

0

1

combustion

3

decomposition

double replacement

synthesis

single replacement

The balanced equation for the decomposition of sodium azide is:
______ NaN3 --> ______ Na + ______ N2

Other Answer Choices:

0

3

1

2

In the following equations, use Le Chatelier's Principle to determine whether the reaction will shift right, left, or no shift.
N2(g) + 3H2(g) ⇌ 2NH3(g) + heat
Stress                                Shift  . 
add N2                                               __________
remove H2                     __________
increase temperature __________
decrease pressure       __________
add a catalyst               __________
remove NH3                  __________

Select the correct way to calculate how many moles of carbon dioxide there are when you have 52.06 g of carbon dioxide (CO2), and choose the correct answer. (Choose 2 selections from below)

convert the given mass to moles by dividing by the molar mass

0.845 mol

1.18 mol

multiply the given mass by the molar mass to convert to moles

2342 mol

divide the molar mass by the given mass to convert to moles

The combustion of propane (C3H8) produces CO2 and H2O according to the following balanced reaction:
              C3H8 (g) + 5O2 (g) --> 3CO2 (g) + 4H2O (g)
Given 2.5 mol propane (C3H8), how many moles of CO2 will be produced?
(2.5 mol C3H8) x (___________________________)  = ________________ 

Other Answer Choices:

0.83 mol CO2

1 mol C3H8 / 3 mol CO2

3 mol CO2 / 1 mol C3H8

1 mol C3H8 / 32 g C3H8

7.5 mol CO2

32 g C3H8 / 1 mol C3H8

Determine how the following actions will affect reaction rate by choosing the correct response.
a. Platinum is used in catalytic converters in cars to convert toxic gases to carbon dioxide and water. If much less platinum is used to make the catalytic converter, the conversion of the gases would__________
b. Magnesium metal is reacted with hot water in two beakers to produce magnesium hydroxide and hydrogen gas. Beaker 1 had a one-inch strip of magnesium and beaker 2 has a one-inch strip cut into tiny pieces. The rate of reaction in beaker 2 is __________ beaker 1.
c. An experiment is carried out at 40oC and 70oC. The experiment carried out at 70oC occurs faster. This is because __________

Which reaction diagram shows the effect of using the appropriate catalyst in a chemical reaction?

In a sealed bottle that is half full of water, equilibrium will be reached when water molecules

begin to condense

are equal in number for both the liquid and the gas phase

stop evaporating

evaporate and condense at equal rates

3X + 8Y --> X3Y8

3X + 6Y --> X3Y6

X + 2Y --> XY2

3X + 8Y --> 3XY2 + 2Y

In the chemical reaction shown below, all of the HCl and Zn will react to form H2 and ZnCl2
Which of the following statements describes the result of this reaction?

The zinc chloride will have have less mass than the zinc.

The mass of the hydrogen atoms will decrease in the products.

The hydrogen gas will have a mass of zero.

The mass of the products will equal the mass of the reactants.

When a steel block at 100oC is placed on top of a copper block at 20oC, the thermal energy of the copper begins to increase. Which of the following is the source of this increase in energy?

heat flowing by means of radiation

tiny little heat gnomes that carry energy backpacks back and forth

heat flowing by means of conduction

heat flowing by means of convection

A popcorn kernel is up to 13% water. The drawing above shows a kernel of corn that is heated until it pops. Which of the following best explains what happens to the liquid water stored inside the kernel that leads to the popping process?

The liquid water undergoes a physical change into steam.

The liquid water is destroyed by the heat.

The liquid water is converted into heat

The liquid water undergoes a chemical change into hydrogen and oxygen gases.

The diagram shown represents a closed energy system. The system contains equal masses of air, copper, and water in a perfectly insulated container. The temperatures were taken at the time the materials were placed in the closed system.

How will the temperatures of the materials change over an extended period of time?

The temperature of each material will remain constant

Warmer materials will get warmer and cooler materials will get cooler

All of the materials will reach the same temperature

The temperature of each material will decrease

Select which type of bond is being formed in the following substances.

Correctly answer the questions about the heating curve below. There are 5 columns to categorize. You need to scroll over to see them all.

Which of the following objects transfers its energy primarily by radiation?

Ceiling Fan

Burning Candle

Electric Stovetop

Heat lamp

Which of the following is the best example of heat transfer by convection?

From the Sun to Earth

From the griddle to the eggs

From the bottom of the water in the beaker to the surface

From the iron to the shirt

Which of the following has the lowest average molecular kinetic energy?

nitrogen at 75oC

water at 10oC

quartz at 25oC

steel at 50oC

According the the kinetic molecular theory of gases, the particles of a gas have

strong attractions for each other and an insignificant volume

little attractions for each other and an insignificant volume

strong attractions for each other and a significant volume

little attractions for each other and a significant volume

A 0.500-mole sample of a gas has a volume of 11.2 liters at 273 K. What is the pressure of the gas? (use ideal gas law with R = 0.0821 Latm/molK)

0.5 atm

1 atm

273 atm

11.2 atm

A gas has a pressure of 300 torr, a temperature of 400 K, and a volume of 50.0 milliliters. What volume will the gas have at a pressure of 150 torr and a temperature of 200 K?

100 mL

50.0 mL

200 mL

12.5 mL

A gas at STP (standard pressure and temperature) has a volume of 1.0 liter. If the pressure is doubled and the temperature remains constant, the new volume of the gas will be

4.0 L

2.0 L

0.25 L

0.50 L

Which substance is a good conductor of electricity in both the solid and liquid phases?

a metallic substance

an ionic substance

a network covalent substance

a molecular substance

A chemist performs the same tests on two homogeneous white crystalline solids, A and B. The results are shown in the accompanying table.

The results of these test suggest that

both solids contain only covalent bonds

both solids contain only ionic bonds.

solid A contains only covalent bonds and solid B contains only ionic bonds.

solid A contains only ionic bonds and solid B contains only covalent bonds.

Which kind of energy is stored in a chemical bond?

ionization energy

activation energy

potential energy

kinetic energy

Given the reaction:
Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g)
Where solid zinc reacts with hydrochloric acid to produce zinc chloride and hydrogen gas, the reaction occurs more slowly when a single piece of solid zinc is used instead of the same mass of powdered zinc. Why is this the case?

The powdered zinc required less activation energy

The powdered zinc has more surface area

The powdered zinc generates more heat energy

The powdered zinc is more concentrated

Given the above reaction, what is the ratio of moles of H2 consumed to moles of NH3 produced?

2:3

3:2

6:6

1:2

Given the balanced equation:
NaOH + HCl --> NaCl + H2O
What is the total number of grams of H2O produced when 115 grams of the product, NaCl, is formed? Make sure to show your set up in order to get full credit.

54 g

36 g

18 g

9.0 g

What is the total mass of oxygen in 1.00 mole of Al2(CrO4)3?

112 g

48.0 g

192 g

64.0 g

Which factor is a major cause of global warming?

increased burning of fossil fuels

decreased mineral availability

increased number of green plants

decreased carbon dioxide in the atmosphere

An increase in which gas would cause the most greenhouse warming of Earth's atmosphere?

oxygen

hydrogen

nitrogen

carbon dioxide

Global Warming has been linked to a decrease in the

temperature of the Earth

rate of carbon dioxide production

rate of species extinction

size of the polar ice caps

The specific heat of wood is about 1,700 J/kgoC. How much energy is required in joules to heat a 12 kg piece of wood from 20oC to 30oC?

1,400 J

204,000 J

17,000 J

612,000 J

If a 500.0-g block of metal absorbs 5,016 J of heat when its temperature changes from 20.00oC to 45.00oC, what is its specific heat?

1.00 J/g oC

2.49 J/g oC

4.18 J/g oC

0.401 J/g oC

Use the diagram to answer the following question.

How many bonds are made by each carbon atom in the molecule shown above?

four

three

two

one

Two elements in a molecule have the same electronegativity values. Which of the following most likely holds the elements together and why?

an ionic bond, because electrons transfer from one element to the other

a polar covalent bond, because the elements do not share electrons equally

a nonpolar covalent bond, because the elements share electrons equally

an intermolecular force, because the elements do not form a chemical bond

Categorize the following items as being either endothermic or exothermic.

solution feels hot

melting of water

photosynthesis

solution feels cold

Bonds Breaking

condensation of water

combustion 

Bond Formation

Endothermic

Exothermic

Match the element to the correct number of valence electrons

Fr (Francium)

8

S (Sulfur)

2

Ca (Calcium)

5

As (Arsenic)

1

I (Iodine)

6

Kr (Kypton)

4

C (Carbon)

7

In the molecule below, which atom has the largest partial negative charge __________?

C

I

Cl

F

Balance the following equation, and identify its type.
______ AgNO3(aq) + ______ Cu(s) --> ______ Cu(NO3)2(aq) + ______ Ag(s)
 It is a(n) _______________________ reaction.

Select the correct way to calculate how many moles of carbon dioxide there are when you have 52.06 g of carbon dioxide (CO2), and choose the correct answer.   (Choose 2 selections from below)

convert the given mass to moles by dividing by the molar mass

0.845 mol

1.18 mol

multiply the given mass by the molar mass to convert to moles

2342 mol

divide the molar mass by the given mass to convert to moles

The combustion of propane (C3H8) produces CO2 and H2O according to the following balanced reaction:
              C3H8 (g) + 5O2 (g) --> 3CO2 (g) + 4H2O (g)
Given 2.5 mol propane (C3H8), how many moles of CO2 will be produced?
(2.5 mol C3H8) x (___________________________)  = ________________ 

0.83 mol CO2

1 mol C3H8 / 3 mol CO2

3 mol CO2 / 1 mol C3H8

1 mol C3H8 / 32 g C3H8

7.5 mol CO2

32 g C3H8 / 1 mol C3H8

Which reaction diagram shows the effect of using the appropriate catalyst in a chemical reaction?

In a sealed bottle that is half full of water, equilibrium will be reached when water molecules

begin to condense

are equal in number for both the liquid and the gas phase

stop evaporating

evaporate and condense at equal rates

3X + 8Y --> X3Y8

3X + 6Y --> X3Y6

X + 2Y --> XY2

3X + 8Y --> 3XY2 + 2Y

In the chemical reaction shown below, all of the HCl and Zn will react to form H2 and ZnCl2
Which of the following statements describes the result of this reaction?

The zinc chloride will have have less mass than the zinc.

The mass of the hydrogen atoms will decrease in the products.

The hydrogen gas will have a mass of zero.

The mass of the products will equal the mass of the reactants.

When a steel block at 100oC is placed on top of a copper block at 20oC, the thermal energy of the copper begins to increase. Which of the following is the source of this increase in energy?

heat flowing by means of radiation

tiny little heat gnomes that carry energy backpacks back and forth

heat flowing by means of conduction

heat flowing by means of convection

A popcorn kernel is up to 13% water. The drawing above shows a kernel of corn that is heated until it pops. Which of the following best explains what happens to the liquid water stored inside the kernel that leads to the popping process?

The liquid water undergoes a physical change into steam.

The liquid water is destroyed by the heat.

The liquid water is converted into heat

The liquid water undergoes a chemical change into hydrogen and oxygen gases.

The diagram shown represents a closed energy system. The system contains equal masses of air, copper, and water in a perfectly insulated container. The temperatures were taken at the time the materials were placed in the closed system.

How will the temperatures of the materials change over an extended period of time?

The temperature of each material will remain constant

Warmer materials will get warmer and cooler materials will get cooler

All of the materials will reach the same temperature

The temperature of each material will decrease

Select which type of bond is being formed in the following substances.

Ionic

Covalent

Both Ionic and Covalent

AlCl3

Iron (II) Oxide

NO2

H2SO4

CaCO3

C2H5OH

Correctly answer the questions about the heating curve below. There are 5 columns to categorize. You need to scroll over to see them all.

AB

BC

CD

DE

EF

Boiling point

Gas

Solid

Liquid

mixture of solid and liquid

1500 oC

2500 oC

Which of the following objects transfers its energy primarily by radiation?

Ceiling Fan

Burning Candle

Electric Stovetop

Heat lamp

Which of the following is the best example of heat transfer by convection?

From the Sun to Earth

From the griddle to the eggs

From the bottom of the water in the beaker to the surface

From the iron to the shirt

Which of the following has the lowest average molecular kinetic energy?

nitrogen at 75oC

water at 10oC

quartz at 25oC

steel at 50oC

According the the kinetic molecular theory of gases, the particles of a gas have

strong attractions for each other and an insignificant volume

little attractions for each other and an insignificant volume

strong attractions for each other and a significant volume

little attractions for each other and a significant volume

A 0.500-mole sample of a gas has a volume of 11.2 liters at 273 K. What is the pressure of the gas? (use ideal gas law with R = 0.0821 L*atm/mol*K)

0.5 atm

1 atm

273 atm

11.2 atm

A gas has a pressure of 300 torr, a temperature of 400 K, and a volume of 50.0 milliliters.  What volume will the gas have at a pressure of 150 torr and a temperature of 200 K?

100 mL

50.0 mL

200 mL

12.5 mL

A gas at STP (standard pressure and temperature) has a volume of 1.0 liter. If the pressure is doubled and the temperature remains constant, the new volume of the gas will be

4.0 L

2.0 L

0.25 L

0.50 L

Which substance is a good conductor of electricity in both the solid and liquid phases?

a metallic substance

an ionic substance

a network covalent substance

a molecular substance

A chemist performs the same tests on two homogeneous white crystalline solids, A and B. The results are shown in the accompanying table.

The results of these test suggest that

both solids contain only covalent bonds

both solids contain only ionic bonds.

solid A contains only covalent bonds and solid B contains only ionic bonds.

solid A contains only ionic bonds and solid B contains only covalent bonds.

Which kind of energy is stored in a chemical bond?

ionization energy

activation energy

potential energy

kinetic energy

Given the reaction:
Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g)
Where solid zinc reacts with hydrochloric acid to produce zinc chloride and hydrogen gas, the reaction occurs more slowly when a single piece of solid zinc is used instead of the same mass of powdered zinc. Why is this the case?

The powdered zinc required less activation energy

The powdered zinc has more surface area

The powdered zinc generates more heat energy

The powdered zinc is more concentrated

Given the above reaction, what is the ratio of moles of H2 consumed to moles of NH3 produced?

2:3

3:2

6:6

1:2

Given the balanced equation:
NaOH + HCl --> NaCl + H2O
What is the total number of grams of H2O produced when 115 grams of the product, NaCl, is formed? Make sure to show your set up in order to get full credit.

54 g

36 g

18 g

9.0 g

What is the total mass of oxygen in 1.00 mole of Al2(CrO4)3?

112 g

48.0 g

192 g

64.0 g

Which factor is a major cause of global warming?

increased burning of fossil fuels

decreased mineral availability

increased number of green plants

decreased carbon dioxide in the atmosphere

An increase in which gas would cause the most greenhouse warming of Earth's atmosphere?

oxygen

hydrogen

nitrogen

carbon dioxide

Global Warming has been linked to a decrease  in the 

temperature of the Earth

rate of carbon dioxide production

rate of species extinction

size of the polar ice caps

The specific heat of wood is about 1,700 J/kgoC. How much energy is required in joules to heat a 12 kg piece of wood from 20oC to 30oC?

1,400 J

204,000 J

17,000 J

612,000 J

If a 500.0-g block of metal absorbs 5,016 J of heat when its temperature changes from 20.00oC to 45.00oC, what is its specific heat?

1.00 J/g oC

2.49 J/g oC

4.18 J/g oC

0.401 J/g oC

	AB	BC	CD	DE	EF
Boiling point
Gas
Solid
Liquid
mixture of solid and liquid
1500 oC
2500 oC

Chemistry Semester 2 Exam 2024

Chemistry Semester 2 Exam 2024

Use the diagram to answer the following question.How many bonds are made by each carbon atom in the molecule shown above?

Two elements in a molecule have the same electronegativity values. Which of the following most likely holds the elements together and why?

Categorize the following items as being either endothermic or exothermic.

Match the element to the correct number of valence electrons

In the molecule below, which atom has the largest partial negative charge __________?

Select the correct way to calculate how many moles of carbon dioxide there are when you have 52.06 g of carbon dioxide (CO2), and choose the correct answer. (Choose 2 selections from below)

Which reaction diagram shows the effect of using the appropriate catalyst in a chemical reaction?

In a sealed bottle that is half full of water, equilibrium will be reached when water molecules

In the chemical reaction shown below, all of the HCl and Zn will react to form H2 and ZnCl2Which of the following statements describes the result of this reaction?

When a steel block at 100oC is placed on top of a copper block at 20oC, the thermal energy of the copper begins to increase. Which of the following is the source of this increase in energy?

A popcorn kernel is up to 13% water. The drawing above shows a kernel of corn that is heated until it pops. Which of the following best explains what happens to the liquid water stored inside the kernel that leads to the popping process?

Select which type of bond is being formed in the following substances.

Correctly answer the questions about the heating curve below. There are 5 columns to categorize. You need to scroll over to see them all.

Which of the following objects transfers its energy primarily by radiation?

Which of the following is the best example of heat transfer by convection?

Which of the following has the lowest average molecular kinetic energy?

According the the kinetic molecular theory of gases, the particles of a gas have

A 0.500-mole sample of a gas has a volume of 11.2 liters at 273 K. What is the pressure of the gas? (use ideal gas law with R = 0.0821 L*atm/mol*K)

A gas has a pressure of 300 torr, a temperature of 400 K, and a volume of 50.0 milliliters. What volume will the gas have at a pressure of 150 torr and a temperature of 200 K?

A gas at STP (standard pressure and temperature) has a volume of 1.0 liter. If the pressure is doubled and the temperature remains constant, the new volume of the gas will be

Which substance is a good conductor of electricity in both the solid and liquid phases?

A chemist performs the same tests on two homogeneous white crystalline solids, A and B. The results are shown in the accompanying table.The results of these test suggest that

Which kind of energy is stored in a chemical bond?

Given the reaction:Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g)Where solid zinc reacts with hydrochloric acid to produce zinc chloride and hydrogen gas, the reaction occurs more slowly when a single piece of solid zinc is used instead of the same mass of powdered zinc. Why is this the case?

Given the above reaction, what is the ratio of moles of H2 consumed to moles of NH3 produced?

Given the balanced equation:NaOH + HCl --> NaCl + H2OWhat is the total number of grams of H2O produced when 115 grams of the product, NaCl, is formed? Make sure to show your set up in order to get full credit.

What is the total mass of oxygen in 1.00 mole of Al2(CrO4)3?

Which factor is a major cause of global warming?

An increase in which gas would cause the most greenhouse warming of Earth's atmosphere?

Global Warming has been linked to a decrease in the

The specific heat of wood is about 1,700 J/kgoC. How much energy is required in joules to heat a 12 kg piece of wood from 20oC to 30oC?

If a 500.0-g block of metal absorbs 5,016 J of heat when its temperature changes from 20.00oC to 45.00oC, what is its specific heat?

Use the diagram to answer the following question.

How many bonds are made by each carbon atom in the molecule shown above?

In the chemical reaction shown below, all of the HCl and Zn will react to form H2 and ZnCl2
Which of the following statements describes the result of this reaction?

A 0.500-mole sample of a gas has a volume of 11.2 liters at 273 K. What is the pressure of the gas? (use ideal gas law with R = 0.0821 Latm/molK)

A chemist performs the same tests on two homogeneous white crystalline solids, A and B. The results are shown in the accompanying table.

The results of these test suggest that

Given the reaction:
Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g)
Where solid zinc reacts with hydrochloric acid to produce zinc chloride and hydrogen gas, the reaction occurs more slowly when a single piece of solid zinc is used instead of the same mass of powdered zinc. Why is this the case?

Given the balanced equation:
NaOH + HCl --> NaCl + H2O
What is the total number of grams of H2O produced when 115 grams of the product, NaCl, is formed? Make sure to show your set up in order to get full credit.