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Chemistry Fall Semester Review
Chemistry Fall Semester Review
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Chemistry I semester exam review
Flashcards
50 cards
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Practice quiz
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Questions
50
Answers
1
The density of Al is 2.7 g/mL. The volume is 1.5 mL. Find it's mass.
4.05 g
2.7 g
1.8 g
1.5 g
2
Which statement is NOT true of nonmetals?
There are fewer nonmetals than metals
They have characteristics of both metals and nonmetals
They have low conductivity
Many are gases at room temperature
3
Branch of chemistry concerned with properties, changes & relationships between energy & matter
analytical
physical
theoretical
inorganic
4
The symbol mm represents
micrometer
millimeter
milliliter
meter
5
An atom is electrically neutral because
the numbers of protons and electrons are equal
neutrons balance the protons and electrons
the numbers of protons and neutrons are equal
nuclear forces stabilize the charges
6
The mass of a 5 mL sample of gold is 96.5g. What is the density?
0.0518 g/mL
101.5 g/mL
483 g/mL
19.3 g/mL
7
The average atomic mass of an element is the average of the atomic masses of its
naturally occurring isotopes
nonradioactive isotopes
two most abundant isotopes
artificial isotopes
8
All of the following are examples of units EXCEPT
meter
gram
teaspoon
weight
9
A neutral atom of silicon contains
38 electrons
28 electrons
14 electrons
16 electrons
10
A nuclear particle that has about the same mass as a proton, but with no electrical charge, is
neutron
nuclide
isotope
electron
11
The state of matter in which particles are rigidly held in fixed position...
vapor
gas
liquid
solid
12
An atom of potassium has 19 protons and 20 neutrons. What is its mass number?
39
10
20
19
13
Which state of matter has neither a definite shape or volume?
solid
gas
liquid
elemental
14
1.06L of water is equivalent to
1060mL
.00106mL
10.6mL
106mL
15
To two significant figures, the measurement 0.0255 g should be reported as
2.5 g
0.026 g
0.025 g
0.02 g
16
Physical means can be used to separate
elements
compounds
mixtures
pure substances
17
Research carried out for the sake of increasing knowledge
basic
applied
18
Isotopes of an element contain different numbers of
nuclides
neutrons
protons
electrons
19
An aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. Its mass number is
13
40
14
27
20
Study of the composition and structure of materials and the changes that materials undergo
chemistry
physics
biology
engineering
21
Which is an example of a heterogeneous mixture?
nuts and bolts
pudding
gelatin
fruit salad
22
Research carried out to solve a problem
Basic
Applied
23
To calculate the density of an object
divide its volume by its mass
divide its mass by its volume
divide its mass by its area
multiply its mass and its volume
24
An example of a chemical change is
milk going sour
vaporizing gasoline
melting ice
sanding wood
25
.25 kg is equivalent to
0.025 mg
250kg
250 mg
0.025kg
26
The density of pure diamond is 3.5g/mL. The mass of a diamond is .25g. What is it's volume?
14mL
3.5mL
0.071mL
0.875mL
27
Which of the following observations is quantitative?
The liquid boils at 100 degrees celcius
The liquid turns blue litmus paper red
The liquid tastes bitter
The liquid is cloudy
28
The atomic number of oxygen, 8, indicates that there are eight
protons in the nucleus of an oxygen atom
neutrons outside the oxygen atom's nucleus
energy levels in the oxygen atom's nucleus
oxygen nuclides
29
A measurement that closely agrees with accepted values is said to be
precise
reliable
significan
accurate
30
The SI unit for length and mass are
centimeter and kilogram
meter and gram
meter and kilogram
centimeter and gram
31
A physical property may be investigated by
allowing silver to tarnish
letting milk turn sour
burning wood
melting ice
32
If measurements agree closely but differ widely from the actual value, these measurements are
neither precise nor accurate
accurate but not precise
precise but not accurate
acceptable as a new standard of accuracy
33
An example of an extensive physical property is
mass
boiling point
density
color
34
A vertical column of blocks in the periodic table is called a(n)
group
property
octet
period
35
When determining the number of significant digits in a measurement
all nonzero digits are not significant
all zeros between two nonzero digits are not significant
all nonzero digits are significant
all zeros are significant
36
Which of the following is an intensive physical property?
length
color
mass
volume
37
The number of significant figures in the measurement 0.000305 kg is
4
3
5
6
38
Which of the following observations is qualitative?
The solid has a mass of 2.3 grams
Salt deposits form from an evaporated liquid
A chemical reaction is complete in 2.3 seconds
The pH of a liquid is 2.3
39
The study of substances containing carbon
organic chemistry
nuclear chemistry
inorganic chemistry
analytical chemistry
40
Branch of chem that includes the study of materials and processes that occur in living things
analytical
physical
organic
biochemistry
41
What is the atomic number for aluminum?
13
26
14
27
42
The total number of protons and neutrons in the nucleus of an atom is its
Avogadro constant
number of neutrons
atomic number
mass number
43
.05 cm is the same as
.005m
.5mm
.05m
.00005m
44
When 64.4 is divided by 2.00, the correct number of significant figures in the result is
4
3
2
1
45
Five darts strike near the center of the target. Whoever threw the darts is
precise
neither accurate nor precise
accurate
both accurate and precise
46
How many minutes are in one week?
100,800min
1440min
168min
10,080min
47
Which state of matter has a definite shape and volume?
vapor
liquid
solid
gas
48
A physical change occurs when a
copper bowl tarnishes
peach spoils
bracelet turns your wrist green
glue gun melts a glue stick
49
The most useful source of chemical information about the chemical elements is
calculator
table of isotopes
periodic table
metric equivalents table
50
A horizontal row of blocks in the periodic table is called a(n)
octet
family
group
period
