CHEM 134 LECTURE EXAM 1 QUESTIONS WITH
COMPLETE SOLUTIONS
What is matter? give examples of matter. Ans✓✓✓ anything that takes
up space and has mass. ex: you, trees, water, a house, air
What is a substance? ex Ans✓✓✓ A form of matter that has a definite
(constant) composition and distinct properties (water, ammonia, sugar,
table salt)
What is a mixture? ex Ans✓✓✓ is a combination of two or more
substances in which the substances retain their distinct identities
(constant composition throughout) ex: sweat
what are the two types of mixtures? Ans✓✓✓ homogeneous and
heterogeneous mixtures
What is a homogeneous mixture? ex Ans✓✓✓ a mixture that is the
same throughout (coffee)
What is a heterogeneous mixture? ex Ans✓✓✓ a mixture in which the
composition is not uniform throughout (pieces of seaweed in water)
what are the three states of matter? Ans✓✓✓ solid, liquid, gas
how do you identify a substance? Ans✓✓✓ based on their properties
and their composition
,what are the four types of properties? Ans✓✓✓ physical, chemical,
intensive, extensive
What is a physical property/how is it measured? ex of physical changes
Ans✓✓✓ 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
Ans✓✓✓ 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)? Ans✓✓✓ 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)? Ans✓✓✓ 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?
Ans✓✓✓ No
what is a measured quantity? Ans✓✓✓ written as number with an
appropriate unit and are essential to stating measurement correctly.
,what is metric unit? Ans✓✓✓ a metric unit is mass length volume.
related decimally to the power of 10
what is a revised metric system? Ans✓✓✓ international system of units
called SI units
What is length measured in and what is the symbol for this
measurement? Ans✓✓✓ meters (m)
what is mass measured in? symbol Ans✓✓✓ kilograms (kg)
what is time measured in? symbol Ans✓✓✓ seconds (s)
what is electrical current measured in? symbol Ans✓✓✓ ampere (A)
what is temperature measured in? Ans✓✓✓ (K) Kelvin
what is the amount of a substance measured in? symbol Ans✓✓✓ Mole
(mol)
what luminous intensity measured in? Ans✓✓✓ candela (cd)
, what is the symbol for tera and what does it mean in SI units?
Ans✓✓✓ T. SI units: 10^12
what is the symbol for giga and what does it mean in SI units?
Ans✓✓✓ G. 10^9
what is the symbol for mega and what does it mean in SI units?
Ans✓✓✓ M. 10^6
what is the symbol for kilo and what does it mean in SI units?
Ans✓✓✓ k. 10^3
what is the symbol for deci and what does it mean in SI units?
Ans✓✓✓ d. 10^-1
what is the symbol for centi and what does it mean in SI units?
Ans✓✓✓ c. 10^-2
what is the symbol for milli and what does it mean in SI units?
Ans✓✓✓ m. 10^-3
what is the symbol for micro and what does it mean in SI units?
Ans✓✓✓ u/mu. 10^-6
COMPLETE SOLUTIONS
What is matter? give examples of matter. Ans✓✓✓ anything that takes
up space and has mass. ex: you, trees, water, a house, air
What is a substance? ex Ans✓✓✓ A form of matter that has a definite
(constant) composition and distinct properties (water, ammonia, sugar,
table salt)
What is a mixture? ex Ans✓✓✓ is a combination of two or more
substances in which the substances retain their distinct identities
(constant composition throughout) ex: sweat
what are the two types of mixtures? Ans✓✓✓ homogeneous and
heterogeneous mixtures
What is a homogeneous mixture? ex Ans✓✓✓ a mixture that is the
same throughout (coffee)
What is a heterogeneous mixture? ex Ans✓✓✓ a mixture in which the
composition is not uniform throughout (pieces of seaweed in water)
what are the three states of matter? Ans✓✓✓ solid, liquid, gas
how do you identify a substance? Ans✓✓✓ based on their properties
and their composition
,what are the four types of properties? Ans✓✓✓ physical, chemical,
intensive, extensive
What is a physical property/how is it measured? ex of physical changes
Ans✓✓✓ 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
Ans✓✓✓ 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)? Ans✓✓✓ 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)? Ans✓✓✓ 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?
Ans✓✓✓ No
what is a measured quantity? Ans✓✓✓ written as number with an
appropriate unit and are essential to stating measurement correctly.
,what is metric unit? Ans✓✓✓ a metric unit is mass length volume.
related decimally to the power of 10
what is a revised metric system? Ans✓✓✓ international system of units
called SI units
What is length measured in and what is the symbol for this
measurement? Ans✓✓✓ meters (m)
what is mass measured in? symbol Ans✓✓✓ kilograms (kg)
what is time measured in? symbol Ans✓✓✓ seconds (s)
what is electrical current measured in? symbol Ans✓✓✓ ampere (A)
what is temperature measured in? Ans✓✓✓ (K) Kelvin
what is the amount of a substance measured in? symbol Ans✓✓✓ Mole
(mol)
what luminous intensity measured in? Ans✓✓✓ candela (cd)
, what is the symbol for tera and what does it mean in SI units?
Ans✓✓✓ T. SI units: 10^12
what is the symbol for giga and what does it mean in SI units?
Ans✓✓✓ G. 10^9
what is the symbol for mega and what does it mean in SI units?
Ans✓✓✓ M. 10^6
what is the symbol for kilo and what does it mean in SI units?
Ans✓✓✓ k. 10^3
what is the symbol for deci and what does it mean in SI units?
Ans✓✓✓ d. 10^-1
what is the symbol for centi and what does it mean in SI units?
Ans✓✓✓ c. 10^-2
what is the symbol for milli and what does it mean in SI units?
Ans✓✓✓ m. 10^-3
what is the symbol for micro and what does it mean in SI units?
Ans✓✓✓ u/mu. 10^-6
