CHEM134 C002 SPRING DIGITAL
COLLIGATIVE PROPERTIES BEYOND LABZ
TESTED QUESTIONS AND COMPLETE
SOLUTIONS
◉ what is liquid matter?
Answer: matter that has no fixed volume and takes the shape of
the container. molecules are more spread out and move around.
◉ what is a gas?
Answer: A state of matter with no definite shape or volume. takes
the shape of container and is highly compressible while liquid and
gas are not. molecules jump around like crazy
◉ what is another name for a homogeneous mixture?
Answer: a solution
◉ a mixture can be two things what are they?
Answer: either homogeneous or heterogeneous
◉ a pure substance can be two things what are they?
Answer: either a compound or element
,◉ What is a element?
Answer: A substance that cannot be broken down into simpler
substances (only one type of atom)
◉ What is a compound?
Answer: substance formed by the chemical combination of two or
more elements in definite proportions
◉ what are the three physical methods in which a mixture can be
separated ?
Answer: distillation, decanting, filtration
◉ What is a physical change?
Answer: change in the form of a substance not in the chemical
composition. change of state, appearance, odor, color.
(vaporization, melting, freezing, sublimation, condensation,
deposition)
◉ What is a chemical change? ex
Answer: A change in matter that produces one or more new
substances (acidity, corrosiveness, flammability, combustion,
burning, rusting)
◉ matter to compound to element to atom to
Answer: electron and nucleus to proton and neutron
,◉ what is the standard way to convert?
Answer: always divide by the given unit so u can cancel it out and
multiply by desired unit
◉ What are significant figures?
Answer: Significant figures are the valid digits in a measurement
plus the last uncertain digit
◉ write 25 ml with two sig figs
Answer: 25.00 or 25 mL
◉ What is accuracy and precision?
Answer: Accuracy refers to how close a measured value is to an
accepted value. Precision refers to how close a series of
measurements are to one another.
◉ are non zero integers counted as significant figures?
Answer: yes
◉ if a 0 comes before nonzero digits is it significant?
Answer: no
◉ if zeros are between nonzero digits are they significant?
, Answer: yes
◉ are zeros after nonzero digits after a decimal significant?
Answer: yes
◉ how many sig figs are in 1200 and why?
Answer: 2 because for the zeros to be sig they must be followed by
a decimal point.
◉ exact number like 12 or 2piR^2(volume of a sphere) or 2piR
(circumference of a circle) or 1in= 2.54 cm have how many sig
figs?
Answer: they have an infinite number of sigs figs
◉ when u multiply or divide numbers whata re teh sig figs in ur
results based on?
Answer: the least number of sig figs in the division or
multiplication
◉ when u subtract or add numbers what is the number of sig figs
in results based on?
Answer: the least number of digits after the decimal.
◉ what is the chemists dozen?
Answer: mole
COLLIGATIVE PROPERTIES BEYOND LABZ
TESTED QUESTIONS AND COMPLETE
SOLUTIONS
◉ what is liquid matter?
Answer: matter that has no fixed volume and takes the shape of
the container. molecules are more spread out and move around.
◉ what is a gas?
Answer: A state of matter with no definite shape or volume. takes
the shape of container and is highly compressible while liquid and
gas are not. molecules jump around like crazy
◉ what is another name for a homogeneous mixture?
Answer: a solution
◉ a mixture can be two things what are they?
Answer: either homogeneous or heterogeneous
◉ a pure substance can be two things what are they?
Answer: either a compound or element
,◉ What is a element?
Answer: A substance that cannot be broken down into simpler
substances (only one type of atom)
◉ What is a compound?
Answer: substance formed by the chemical combination of two or
more elements in definite proportions
◉ what are the three physical methods in which a mixture can be
separated ?
Answer: distillation, decanting, filtration
◉ What is a physical change?
Answer: change in the form of a substance not in the chemical
composition. change of state, appearance, odor, color.
(vaporization, melting, freezing, sublimation, condensation,
deposition)
◉ What is a chemical change? ex
Answer: A change in matter that produces one or more new
substances (acidity, corrosiveness, flammability, combustion,
burning, rusting)
◉ matter to compound to element to atom to
Answer: electron and nucleus to proton and neutron
,◉ what is the standard way to convert?
Answer: always divide by the given unit so u can cancel it out and
multiply by desired unit
◉ What are significant figures?
Answer: Significant figures are the valid digits in a measurement
plus the last uncertain digit
◉ write 25 ml with two sig figs
Answer: 25.00 or 25 mL
◉ What is accuracy and precision?
Answer: Accuracy refers to how close a measured value is to an
accepted value. Precision refers to how close a series of
measurements are to one another.
◉ are non zero integers counted as significant figures?
Answer: yes
◉ if a 0 comes before nonzero digits is it significant?
Answer: no
◉ if zeros are between nonzero digits are they significant?
, Answer: yes
◉ are zeros after nonzero digits after a decimal significant?
Answer: yes
◉ how many sig figs are in 1200 and why?
Answer: 2 because for the zeros to be sig they must be followed by
a decimal point.
◉ exact number like 12 or 2piR^2(volume of a sphere) or 2piR
(circumference of a circle) or 1in= 2.54 cm have how many sig
figs?
Answer: they have an infinite number of sigs figs
◉ when u multiply or divide numbers whata re teh sig figs in ur
results based on?
Answer: the least number of sig figs in the division or
multiplication
◉ when u subtract or add numbers what is the number of sig figs
in results based on?
Answer: the least number of digits after the decimal.
◉ what is the chemists dozen?
Answer: mole
