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CHEM 134 LECTURE EXAM 1 Questions and Answers
with Solutions UPDATED!!!
What is matter? give examples of matter. - ANSWER anything
that takes up space and has mass. ex: you, trees, water, a
house, air
What is a substance? ex - ANSWER A form of matter that has a
definite (constant) composition and distinct properties (water,
ammonia, sugar, table salt)
What is a mixture? ex - ANSWER 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? - ANSWER homogeneous
and heterogeneous mixtures
What is a homogeneous mixture? ex - ANSWER a mixture that is
the same throughout (coffee)
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What is a heterogeneous mixture? ex - ANSWER a mixture in
which the composition is not uniform throughout (pieces of
seaweed in water)
what are the three states of matter? - ANSWER solid, liquid, gas
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)
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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
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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
what is the amount of a substance measured in? symbol -
ANSWER Mole (mol)
what luminous intensity measured in? - ANSWER candela (cd)
what is the symbol for tera and what does it mean in SI units? -
ANSWER T. SI units: 10^12
CHEM 134 LECTURE EXAM 1 Questions and Answers
with Solutions UPDATED!!!
What is matter? give examples of matter. - ANSWER anything
that takes up space and has mass. ex: you, trees, water, a
house, air
What is a substance? ex - ANSWER A form of matter that has a
definite (constant) composition and distinct properties (water,
ammonia, sugar, table salt)
What is a mixture? ex - ANSWER 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? - ANSWER homogeneous
and heterogeneous mixtures
What is a homogeneous mixture? ex - ANSWER a mixture that is
the same throughout (coffee)
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What is a heterogeneous mixture? ex - ANSWER a mixture in
which the composition is not uniform throughout (pieces of
seaweed in water)
what are the three states of matter? - ANSWER solid, liquid, gas
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)
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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
, Page |4
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
what is the amount of a substance measured in? symbol -
ANSWER Mole (mol)
what luminous intensity measured in? - ANSWER candela (cd)
what is the symbol for tera and what does it mean in SI units? -
ANSWER T. SI units: 10^12
