Chemistry S2 Final SY 23-24

Akwankyerɛ

It's been a pleasure being your teacher this school year--I'm

SO proud of your achievements!

Keep in mind that this test is a snapshot of what you've learned. That said, make sure to read each question carefully and choose the best answer(s). It's preferable to avoid writing on the copy you receive--this will allow another student to use it as well. Nevertheless, if you'd like to annotate, please GO for it. You GOT this!

1

During a chemical reaction, which of the following takes place?

Atoms are created.

Atoms are destroyed.

Atoms are rearranged.

Atoms do not move.

1

Examine the following reaction and then identify the reactants (Choose 2):
HCl + NaOH --> H₂O + NaCl

HCl

H₂O

NaOH

NaCl

1

The image below displays an example of a physical change and an example of a chemical change.
Define a chemical change.

Matter cannot be created or destroyed, only change form.

Changing of only the appearance of the object.

Changes affecting the form of a chemical substance, but not what it's made from or how it's made.

Any change that results in the formation of one (or more) new chemical substance(s).

1

Which of the following are examples of chemical changes (Choose 2).

burning

breaking

changing from liquid to solid

rusting

SCI.8.5e

1

Which of the following indicate that a chemical change has taken place? (Choose 2)

formation of a gas

shattering into many pieces

unexpected change in temperature

change from a liquid to a gas

SCI.8.5e

1

What does the Law of Conservation of Matter state?

The scientific law states that all matter can be created.

The scientific law states that the number of atoms before and after a chemical reaction will always remain the same.

The scientific law states that all matter can be destroyed.

The scientific law states that the number of atoms before and after a chemical reaction will always change.

1

Jasmin mixed 4 grams of baking soda and 20 grams of vinegar in a flask. She watched the chemicals bubble and felt the temperature of the container decrease. During the chemical reaction, carbon dioxide gas was produced. She calculated the mass of the chemicals after the chemical reaction took place and found it was 22 grams. What must have happened to the missing 2 grams of mass?

It was destroyed during the chemical reaction.

It left the flask as a gas.

It was absorbed by the other chemicals.

It was absorbed by the flask.

1

How many oxygen atoms are in Al₂(SO₄)₃?

2

3

7

12

1

Which is the correct formula for: three hydrogen (H) one sulfur (S) four oxygen (O)

H₄S₃O

HSO₄

H₂O

H₃SO₄

1

Identify the type of reaction: 2C₅H₅ + Fe --> Fe(C₅H₅)₂

decomposition

combination

combustion

single replacement

1

Which chemical reaction breaks down into 2 substances? See the example below:
KClO₃ --> KCl + O₂

single replacement

synthesis

combustion

decomposition

1

Complete the sentence frame: ___________________ is the capacity to do work or supply heat.

Thermochemistry

Matter

Conversion

Energy

1

Which is NOT a true statement about energy?

Energy can change from one form to another.

Energy can cause movement.

Energy can cause a temperature change.

Energy can be completely used up.

1

Identify the type of energy represented in each part of the image. Part 1 represents...

chemical

mechanical

electrical

sound

1

Identify the type of energy represented in each part of the image. Part 1 represents...

light

chemical

electrical

thermal

1

Identify the type of energy represented in each part of the image. Part 1 represents...

chemical

mechanical

electrical

potential

1

At what point does the object have the most potential energy?

a

b

c

d

1

At what point does the object have the most kinetic energy and the least potential energy?

a

b

c

d

1

Which of the following describe thermal energy? Choose 2.

Depends on the number of molecules present

Does not depend on the number of molecules present

A measure of the total kinetic energy of all particles

A measure of the average kinetic energy of all the particles

1

The image below represents the process of heat flow. Choose the option that best describes part a.

The objects have a difference in thermal mass.

The objects have a difference in potential energy.

The objects have a difference in temperature.

The objects have a difference in total number of particles.

1

The image below represents the process of heat flow. Choose the option that best describes part b.

Heat is being transferred from the cold object to the hot object.

Thermal energy is being transferred from the cold object to the warm object.

Thermal energy is being transferred from the hot object to the warm object.

Thermal energy is being transferred from the hot object to the cold object.

1

The image below represents the process of heat flow. Choose the option that best describes part c.

Heat flows slowly from one object to the other. Equilibrium has been reached.

Heat flows from the warm object to the hot object. Equilibrium has been reached.

Heat is quickly flowing from one object to the other. Equilibrium has been reached.

Heat has stopped flowing between the objects. Equilibrium has been reached.

1

Examine the image. Which of the following explains what's happening in the hot water jar?

In hot water, the water and food coloring particles collided often. As a substance gains thermal energy, it's particles move faster.

In hot water, the water and food coloring particles collided somewhat. As a substance gains thermal energy, it's particles move slightly.

In hot water, the water and food coloring particles collided somewhat often. As a substance gains thermal energy, its particles move hardly at all.

In hot water, the water and food coloring particle rarely collide. As a sumbstance gains thermal energy, the particles are almost motionless.

1

Examine the image. Which statement is true about the kinetic energy of the molecules in the diagrams?

The molecules are moving faster in diagram A

The molecules are moving at the same rate in both diagrams

The molecules are moving slower in diagram A

More information is required to draw a conclusion about the kinetic energy of particles in either container.

1

Ice cream melting is an example of an __________ process because heat is absorbed.

endothermic

exothermic

1

Sweating is an __________________ process because heat is released.

endothermic

exothermic

1

When baking a cake, heat is transferred from the in the oven to the dough until there is between the dough and the surroundings.

cold air, thermal contact

cold air, thermal equilibrium

hot air, thermal contact

hot air, thermal equilibrium

1

The atmosphere is mostly made up of the gases and _.

carbon dioxide and argon

nitrogen and oxygen

helium and nitrogen

carbon dioxide and oxygen

1

In which layer do virtually all weather phenomena take place?

Mesosphere

Stratosphere

Thermosphere

Troposphere

1

The chart displays greenhouse gas emissions from different sources.
What is shown in the x-axis?

billions of metric tons of greenhouse gases

the effects of greenhouse gases

the years included in the graph

the amount of heat trapped by greenhouse gases

1

What is shown in the y-axis?

millions of metric tons of greenhouse gases

the effects of greenhouse gases

the years included in the graph

the amount of heat trapped by greenhouse gases

1

Which claim about sources of greenhouse gas emissions is BEST supported by the data patterns in the graph?

Greenhouse gas emissions from buildings in the United States have decreased significantly from 2005 to 2019.

There's little difference between greenhouse gas emissions from buildings and transportations.

Greenhouse gas emissions from power were at an ultimate high in the United States in 2019.

Greenhouse gas emissions from transportation in the United States peaked in 2019.

1

Which piece of evidence about the patterns in the graph supports your claim?

Whereas we use to use alternative forms of energy in 2005, including solar power, now we primarily use burn fossil fuels to produce electricity, which explain why greenhouse gas emissions peaked in 2019.

In comparison to the Industry Sector, buildings use significantly more fossil fuels for various purposes, including heating up spaces. This explains why Buildings had more greenhouse gas emissions than Industry from 2005 to 2019.

Globalization has increased the demand for transporation and vehicles need gasoline. to work. Gasoline is made from crude oil, a type of fossil fuel, and when it's burned, it produces carbon dioxide. This explains why greenhouse gas emissions from transportation have increased over time.

Given that communities are recycling products more, as opposed to throwing them in landfills to be burned, there has been a notable decrease in greenhouse gas emissions in the "Other" category from 2005 to 2019.

1

The diagram show changes in particle motion as a substances changes state of matter. Identify the state indicated.

Solid

Liquid

Gas

Plasma

1

This phase state is

Solid

Liquid

Gas

Plasma

1

Kinetic Molecular Theory states that...

atoms and molecules move in continuous and non-random motion.

atoms and molecules move in continuous and random motion.

the kinetic energies of atoms and molecules decrease with increasing temperature.

the pressure of atoms and molecules is due to the collision of these particles with each other.

1

Which statement best describes the collisions of gas particles according to the kinetic-molecular theory?

When particles pass close enough to one another, their attractions pull them together, and then they bounce apart with no gain or loss of energy.

As particles travel in straight lines, their paths sometimes meet, and then they bounce apart with no gain or loss of energy.

When particles pass close enough to one another, their attractions pull them together, and then they bounce apart with a loss of energy.

As particles travel in straight lines, their paths sometimes meet, and then they bounce apart with a loss of energy.

1

The cooled balloon shrank because the state of matter of the gas molecules in the balloon changed from gas to liquid.

The cooled balloon shrank because the average kinetic energy of the gas molecules in the balloon decreases when the temperature decreases.

The cooled balloon shrank because the gas molecules escaped when the temperature decreased.

The cooled balloon shrank because the average kinetic energy of the gas molecules in the balloon increases when the temperature decreases.

Chemistry S2 Final SY 23-24

During a chemical reaction, which of the following takes place?

Examine the following reaction and then identify the reactants (Choose 2):HCl + NaOH --> H2O + NaCl

The image below displays an example of a physical change and an example of a chemical change. Define a chemical change.

Which of the following are examples of chemical changes (Choose 2).

Which of the following indicate that a chemical change has taken place? (Choose 2)

What does the Law of Conservation of Matter state?

How many oxygen atoms are in Al2(SO4)3?

Which is the correct formula for: three hydrogen (H) one sulfur (S) four oxygen (O)

Identify the type of reaction: 2C5H5 + Fe --> Fe(C5H5)2

Which chemical reaction breaks down into 2 substances? See the example below:KClO3 --> KCl + O2

Complete the sentence frame: ___________________ is the capacity to do work or supply heat.

Which is NOT a true statement about energy?

Identify the type of energy represented in each part of the image. Part 1 represents...

Identify the type of energy represented in each part of the image. Part 1 represents...

Identify the type of energy represented in each part of the image. Part 1 represents...

At what point does the object have the most potential energy?

At what point does the object have the most kinetic energy and the least potential energy?

Which of the following describe thermal energy? Choose 2.

The image below represents the process of heat flow. Choose the option that best describes part a.

The image below represents the process of heat flow. Choose the option that best describes part b.

The image below represents the process of heat flow. Choose the option that best describes part c.

Examine the image. Which of the following explains what's happening in the hot water jar?

Examine the image. Which statement is true about the kinetic energy of the molecules in the diagrams?

Ice cream melting is an example of an __________ process because heat is absorbed.

Sweating is an __________________ process because heat is released.

When baking a cake, heat is transferred from the ________ in the oven to the dough until there is ________ between the dough and the surroundings.

The atmosphere is mostly made up of the gases __________ and ___________.

In which layer do virtually all weather phenomena take place?

The chart displays greenhouse gas emissions from different sources. What is shown in the x-axis?

What is shown in the y-axis?

Which claim about sources of greenhouse gas emissions is BEST supported by the data patterns in the graph?

Which piece of evidence about the patterns in the graph supports your claim?

The diagram show changes in particle motion as a substances changes state of matter. Identify the state indicated.

This phase state is

Kinetic Molecular Theory states that...

Which statement best describes the collisions of gas particles according to the kinetic-molecular theory?

During a chemical reaction, which of the following takes place?

Examine the following reaction and then identify the reactants (Choose 2):HCl + NaOH --> H2O + NaCl

The image below displays an example of a physical change and an example of a chemical change. Define a chemical change.

Which of the following are examples of chemical changes (Choose 2).

Which of the following indicate that a chemical change has taken place? (Choose 2)

What does the Law of Conservation of Matter state?

How many oxygen atoms are in Al2(SO4)3?

Which is the correct formula for: three hydrogen (H) one sulfur (S) four oxygen (O)

Identify the type of reaction: 2C5H5 + Fe --> Fe(C5H5)2

Which chemical reaction breaks down into 2 substances? See the example below:KClO3 --> KCl + O2

Complete the sentence frame: ___________________ is the capacity to do work or supply heat.

Which is NOT a true statement about energy?

Identify the type of energy represented in each part of the image. Part 1 represents...

Identify the type of energy represented in each part of the image. Part 2 represents...

Identify the type of energy represented in each part of the image. Part 3 represents...

Identify the type of energy represented in each part of the image. Part 1 represents...

Identify the type of energy represented in each part of the image. Part 2 represents...

Identify the type of energy represented in each part of the image. Part 3 represents...

Identify the type of energy represented in each part of the image. Part 1 represents...

Identify the type of energy represented in each part of the image. Part 2 represents...

At what point does the object have the most potential energy?

At what point does the object have the most kinetic energy and the least potential energy?

Which of the following describe thermal energy? Choose 2.

The image below represents the process of heat flow. Choose the option that best describes part a.

The image below represents the process of heat flow. Choose the option that best describes part b.

The image below represents the process of heat flow. Choose the option that best describes part c.

Examine the image. Which of the following explains what's happening in the hot water jar?

Examine the image. Which statement is true about the kinetic energy of the molecules in the diagrams?

Ice cream melting is an example of an __________ process because heat is absorbed.

Sweating is an __________________ process because heat is released.

When baking a cake, heat is transferred from the ________ in the oven to the dough until there is ________ between the dough and the surroundings.

The atmosphere is mostly made up of the gases __________ and ___________.

In which layer do virtually all weather phenomena take place?

The chart displays greenhouse gas emissions from different sources. What is shown in the x-axis?

What is shown in the y-axis?

Which claim about sources of greenhouse gas emissions is BEST supported by the data patterns in the graph?

Which piece of evidence about the patterns in the graph supports your claim?

The diagram show changes in particle motion as a substances changes state of matter. Identify the state indicated.

This phase state is

Kinetic Molecular Theory states that...

Which statement best describes the collisions of gas particles according to the kinetic-molecular theory?

Identify the type of energy represented in each part of the image. Part 2 represents...

Examine the following reaction and then identify the reactants (Choose 2):
HCl + NaOH --> H₂O + NaCl

The image below displays an example of a physical change and an example of a chemical change.
Define a chemical change.

How many oxygen atoms are in Al₂(SO₄)₃?

Identify the type of reaction: 2C₅H₅ + Fe --> Fe(C₅H₅)₂

Which chemical reaction breaks down into 2 substances? See the example below:
KClO₃ --> KCl + O₂

When baking a cake, heat is transferred from the in the oven to the dough until there is between the dough and the surroundings.

The atmosphere is mostly made up of the gases and _.

The chart displays greenhouse gas emissions from different sources.
What is shown in the x-axis?

Examine the following reaction and then identify the reactants (Choose 2):
HCl + NaOH --> H₂O + NaCl

The image below displays an example of a physical change and an example of a chemical change.
Define a chemical change.

How many oxygen atoms are in Al₂(SO₄)₃?

Identify the type of reaction: 2C₅H₅ + Fe --> Fe(C₅H₅)₂

Which chemical reaction breaks down into 2 substances? See the example below:
KClO₃ --> KCl + O₂

When baking a cake, heat is transferred from the in the oven to the dough until there is between the dough and the surroundings.

The atmosphere is mostly made up of the gases and _.

The chart displays greenhouse gas emissions from different sources.
What is shown in the x-axis?