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started!
Which of the following is NOT
matter?
SMOKE
AIR
LIGHT
SAND
VERY GOOD!!
LIGHT
Light is a form of energy and energy is NOT
matter!
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INCORRECT
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Which of the following is NOT one
of the three physical states of
matter?
Solid
Liquid
Gas
Aqueous
Very good!
Aqueous
Solid, liquid, and gas are the three physical
states of matter
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INCORRECT
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Which of the following best
describes carbon monoxide (CO)?
Very Good!
Carbon monoxide (CO) is a compound. It is
made up of two or more elements
CHEMICALLY combined.
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INCORRECT
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Salt water is an example of a…
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Salt water is an example of a homogeneous
mixture. The mixture looks uniform
throughout. However, it is a mixture because
both the salt and the water maintain their
original properties and can be physically
separated.
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INCORRECT
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Which of the following CANNOT be
broken down into a simpler
substance?
Oil and water
Juice
Carbon (C)
Sodium chloride (NaCl)
Very Good!
Carbon (C)
Carbon is an element. Elements cannot be
broken into simpler substances.
Sodium chloride is a compound, oil and water is
a heterogeneous mixture, and juice is a
homogeneous mixture. All three of these can
be broken into simpler substances.
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INCORRECT
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The following are observations of what
happens when two solutions are
mixed. Which is NOT evidence that a
chemical reaction has occurred?
There is
fizzing and
bubbling
The test
tube feels
hotter
One of the
solutions
was
yellow to
start
A solid
forms
Very Good!
One of the
solutions
was
yellow to
start
Production of a gas (seen by the fizzing and
bubbling), energy released (the test tube felt
hotter), and the formation of a solid are all
evidence that a chemical reaction has
occurred.
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INCORRECT
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Which of the following is an example
of a chemical change?
Very good!
Remember in a chemical change…something
NEW is produced
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Phase changes are an
example of a…
Chemical
property
Chemical
change
Physical
change
Extensive
property
Very good!
Physical
change
A phase change is only a change in state of
mater so it is a physical change.
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INCORRECT
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What would be the correct symbol for
when solid salt (NaCl) is melted?
Very good!
When salt is melted it becomes a liquid.
Remember that a liquid is different than an
aqueous solution. An aqueous solution is
made when a solid is dissolved in water.
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Mercury is a silver colored liquid. The
silver color of mercury is an example
of a ….
Chemical property
Extensive physical property
Intensive physical property
Physical change
Very good!
Intensive physical property
Intensive properties to not depend on the
amount of a substance.
Extensive properties DO depend on the amount
of a substance…like mass or length
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INCORRECT
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What is true about the following
reaction:
A (s) + B (aq)  C (g) + D (aq)
C and D are reactants
D is a solid
A and B produce
solid products
A and B are reactants
Very good!
A and B are reactants
A chemical reaction has this general form:
Reactants  Products
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Get
started!
How do you write 0.00560 in scientific
notation?
5.60 x 10-3
56.0 x 10-4
0.560 x 10-2
0.560 x 102
5.60 x 103
Very good!
5.60 x 10-3
Remember that when writing a number in
scientific notation, there should be ONE
number to the LEFT of the decimal. Since the
number is less than 1, the exponent should be
negative.
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3.6 x 105 could be also written as…
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Since the exponent is positive, your decimal
should be moving to the right.
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How many sig figs are in the
0.0003005600?
Very good!
Remember that zeros in front of a number are
placeholder zeros and are NOT significant.
Terminating zeros to the right of the decimal
are significant. Any zero in between
significant numbers is significant
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INCORRECT
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How many sig figs are in the
70800000?
Very good!
Remember that zeros after a number but before
the decimal are placeholder zeros and are
NOT significant. Any zero in between
significant numbers is significant
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INCORRECT
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What is the correct answer to the
following problem:
7.815 + 2.07 =
9.885
9.88
9.89
9.9
Very good!
9.89
7.815 + 2.07 = 9.885
When adding or subtracting two numbers, your
answer should have the same number of
decimal places as the measurement with the
least number of decimal places. 2.07 has two
decimal places so your answer should be
rounded to 9.89
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CLOSE! But not quite
correct…don’t forget about
rounding!
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What is the correct answer to the
following problem:
8.670 x 0.54 =
4.682
4.7
4.6818
4.68
Very good!
4.7
8.670 x 0.54 = 4.6818
When you multiply or divide two numbers your
answer should have the same number of total
sig figs as the answer with the fewest sig figs.
0.54 has two sig figs so your answer should be
rounded to 4.7
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INCORRECT
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Great Job! Good luck on your quiz!
I’m in
honors
chemistry
I’m in
chemistry
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Chemistry
• Don’t forget to also study how to record a
measurement with the correct number of
significant figures
• Finish the quiz review given in class for
homework due Monday.
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Honors Chemistry
• Half of your quiz will be on the information in
the presentation, the other half will be on
dimensional analysis
• Don’t forget that the three dimensional
analysis worksheets are due on Monday
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