CHEM 134 LECTURE EXAM 1
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS RATED A+
Question: How is "matter" defined in science, and what are some common
examples of it?
Answer: ✔✔ Matter is anything that possesses mass and occupies physical space.
Examples include everyday objects and elements like trees, water, houses, the air
we breathe, and even yourself.
Question: What defines a chemical "substance," and what are a few examples?
Answer: ✔✔ A substance is a specific form of matter that maintains a constant,
uniform composition and possesses unique, distinct properties. Common examples
include pure water, ammonia, table salt, and sugar.
Question: What constitutes a "mixture" in chemistry, and what is an example?
Answer: ✔✔ A mixture is a physical combination of two or more distinct
substances where each ingredient retains its original, individual identity and
chemical properties. An example of a mixture is sweat.
Question: Into which two primary categories can mixtures be classified?
Answer: ✔✔ Mixtures are broadly categorized into homogeneous mixtures and
heterogeneous mixtures.
Question: What are the characteristics of a homogeneous mixture, and what is a
typical example?
Answer: ✔✔ A homogeneous mixture is one that has a completely uniform
composition throughout its entirety, meaning it looks and acts the same from top to
bottom. A standard example is brewed coffee.
,Question: What defines a heterogeneous mixture, and what is an example of one?
Answer: ✔✔ A heterogeneous mixture is a combination where the composition is
not uniform, allowing you to visibly distinguish different components. An example
is a mixture of seaweed floating in water.
Question: What are the three fundamental states of matter commonly found on
Earth?
Answer: ✔✔ The three primary states of matter are solids, liquids, and gases.
how do you identify a substance? -ANSWER ✔✔based on their properties and
their composition
what are the four types of properties? -ANSWER ✔✔physical, chemical, intensive,
extensive
What is a physical property/how is it measured? ex of physical changes -ANSWER
✔✔Measured without changing the composition of the substance (color, melting
pt, boiling pt. --------- SUBSTANCE IS THE SAME BUT IT PHYSICALLY
CHANGES)
what is a chemical property/how is it measured? ex of chemical changes -
ANSWER ✔✔a chemical property is measures via carrying out a chemical change.
(ex burning H2 to in O2 to make H2O)
What is an extensive property? How is it measured ( using mass, volume, or
density)? -ANSWER ✔✔a property that depends on the amount of matter in a
sample(measured using mass an volume.
, What is an intensive property? How is it measured ( using mass, volume, or
density)? -ANSWER ✔✔a property that depends on the type of matter in a sample,
not the amount of matter. Measured using density
are all types of properties measured using the same instruments? -ANSWER
✔✔No
what is a measured quantity? -ANSWER ✔✔written as number with an
appropriate unit and are essential to stating measurement correctly.
what is metric unit? -ANSWER ✔✔a metric unit is mass length volume. related
decimally to the power of 10
what is a revised metric system? -ANSWER ✔✔international system of units
called SI units
What is length measured in and what is the symbol for this measurement? -
ANSWER ✔✔meters (m)
what is mass measured in? symbol -ANSWER ✔✔kilograms (kg)
what is time measured in? symbol -ANSWER ✔✔seconds (s)
what is electrical current measured in? symbol -ANSWER ✔✔ampere (A)
what is temperature measured in? -ANSWER ✔✔(K) Kelvin
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS RATED A+
Question: How is "matter" defined in science, and what are some common
examples of it?
Answer: ✔✔ Matter is anything that possesses mass and occupies physical space.
Examples include everyday objects and elements like trees, water, houses, the air
we breathe, and even yourself.
Question: What defines a chemical "substance," and what are a few examples?
Answer: ✔✔ A substance is a specific form of matter that maintains a constant,
uniform composition and possesses unique, distinct properties. Common examples
include pure water, ammonia, table salt, and sugar.
Question: What constitutes a "mixture" in chemistry, and what is an example?
Answer: ✔✔ A mixture is a physical combination of two or more distinct
substances where each ingredient retains its original, individual identity and
chemical properties. An example of a mixture is sweat.
Question: Into which two primary categories can mixtures be classified?
Answer: ✔✔ Mixtures are broadly categorized into homogeneous mixtures and
heterogeneous mixtures.
Question: What are the characteristics of a homogeneous mixture, and what is a
typical example?
Answer: ✔✔ A homogeneous mixture is one that has a completely uniform
composition throughout its entirety, meaning it looks and acts the same from top to
bottom. A standard example is brewed coffee.
,Question: What defines a heterogeneous mixture, and what is an example of one?
Answer: ✔✔ A heterogeneous mixture is a combination where the composition is
not uniform, allowing you to visibly distinguish different components. An example
is a mixture of seaweed floating in water.
Question: What are the three fundamental states of matter commonly found on
Earth?
Answer: ✔✔ The three primary states of matter are solids, liquids, and gases.
how do you identify a substance? -ANSWER ✔✔based on their properties and
their composition
what are the four types of properties? -ANSWER ✔✔physical, chemical, intensive,
extensive
What is a physical property/how is it measured? ex of physical changes -ANSWER
✔✔Measured without changing the composition of the substance (color, melting
pt, boiling pt. --------- SUBSTANCE IS THE SAME BUT IT PHYSICALLY
CHANGES)
what is a chemical property/how is it measured? ex of chemical changes -
ANSWER ✔✔a chemical property is measures via carrying out a chemical change.
(ex burning H2 to in O2 to make H2O)
What is an extensive property? How is it measured ( using mass, volume, or
density)? -ANSWER ✔✔a property that depends on the amount of matter in a
sample(measured using mass an volume.
, What is an intensive property? How is it measured ( using mass, volume, or
density)? -ANSWER ✔✔a property that depends on the type of matter in a sample,
not the amount of matter. Measured using density
are all types of properties measured using the same instruments? -ANSWER
✔✔No
what is a measured quantity? -ANSWER ✔✔written as number with an
appropriate unit and are essential to stating measurement correctly.
what is metric unit? -ANSWER ✔✔a metric unit is mass length volume. related
decimally to the power of 10
what is a revised metric system? -ANSWER ✔✔international system of units
called SI units
What is length measured in and what is the symbol for this measurement? -
ANSWER ✔✔meters (m)
what is mass measured in? symbol -ANSWER ✔✔kilograms (kg)
what is time measured in? symbol -ANSWER ✔✔seconds (s)
what is electrical current measured in? symbol -ANSWER ✔✔ampere (A)
what is temperature measured in? -ANSWER ✔✔(K) Kelvin
