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Chemistry Pre/Post Test Review Flashcards | StudBud
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Chemistry Pre/Post Test Review
Chemistry Pre/Post Test Review
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Review for the Pre/Post test
Flashcards
36 cards
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Practice quiz
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Questions
36
Answers
1
In a chemical equation H
2
O
2
(aq)--> H
2
O(l) + O
2
(g), the O
2
is a _____.
Product
Catalyst
Reactant
Solid
2
What is the density of an object having a mass of 8.0 g and a volume of 25 cm
3
?
200 g/cm3
0.32 g/cm3
3.1 g/cm3
2.0 g/cm3
3
What element has the electron configuration 1s
2
2s
2
2p
6
3s
2
3p
2
?
Selenium
Nitrogen
Silicon
Silver
4
The smallest particle of an element that retains the properties of that element is a(n)____.
Electron
Neutron
Atom
Proton
5
If the temperature changes by 100K, by how much does it change in Celsius?
37o Celsius
273o Celsius
0o Celsius
100o Celsius
6
Which of the following CANNOT be classified as a substance?
Air
Table Salt
Gold
Nitrogen
7
Which of the following is NOT an example of matter?
Water Vapor
Air
Heat
Smoke
8
Why do atoms share electrons in covalent bonds?
to become ions and attract each other
to increase their atomic numbers
to become more polar
to attain a noble-gas electron configuration
9
Which of the following is NOT a part of Dalton's atomic theory?
Atoms are always in motion
Atoms of the same element are identical
All elements are composed of atoms
Atoms that combine do so in simple whole-number ratios
10
How many molecules are in 2.10 mole C0
2
3.79 x 1024 molecules
1.26 x 1024 molecules
2.53 x 1024 molecules
3.49 x 10-24 molecules
11
All of the following are physical properties of matter EXCEPT_____.
Color
Melting Point
Mass
Ability to rust
12
In the Bohr model of the atom, an electron in an orbit has a fixed____.
Size
Energy
Position
Color
13
What is another name for the transition metals?
Group C Elements
Group A Elements
Noble Gases
Group B Elements
14
What is the name given to valence electrons that do not participate in bonding in diatomic mol?
Outer pair
Inner pair
Unvalenced pair
Unshared pair
15
Which of the following is true about subatomic particles?
The mass of a neutron nearly equals the mass of a proton
Electrons are negatively charged and are heaviest particles
Protons are positive charged & lightest subatomic particles
Neutrons have no charge and are lightest subatomic particle
16
What is the shape of the 3p atomic orbital?
Dumbbell
Bar
Two perpendicular dumbbells
Sphere
17
What is the charge of a cation?
A negative charge
A positive charge
No charge
The charge depends on the size of the nucleus
18
The closeness of a measurement to its true value is a measure of its?
Usefulness
Accuracy
Reproducibility
Precision
19
When an equation is used to calculate the amount of product that will form, the value is the__.
Minimum yield
Percent Yield
Theoretical yield
Actual Yield
20
The study of chemicals that do not contain carbon is usually called what type of chemistry?
Bio
Analytical
Physical
Inorganic
21
How are the frequency and wavelength of light related?
They are directly proportional to each other
Frequency equals wavelength divided by the speed of light
They are inversely proportional to each other
Wavelength is determined by frequency/speed of light
22
What type of ions have names ending in -ide?
only metal ions
only anions
only gaseous ions
only cations
23
The expression of 5008 km in scientific notation is____.
5.008 x 104 km
50.08 x 10-4 km
5.008 x 10-5 km
5.008 x 103 km
24
Avogadro's number of representative particles is equal to one____.
Kilogram
Kelvin
Gram
Mole
25
What SI unit is used to measure the number of representative particles in a substance?
Mole
Ampere
Kelvin
Kilogram
26
A golf ball has more mass than a tennis ball because it___?
has a definite composition
takes up more space
contains different kinds of matter
contains more matter
27
What does the symbol Δ in a chemical reaction mean?
A catalyst is needed
Yields
Precipitate
Heat is supplied to the reaction
28
Which of the following is NOT a characteristic of most ionic compounds?
They have low melting points
They are composed of metallic and nonmetallic elements
When melted, they conduct an electric current
They are solids
29
What is the electron configuration of the gallium ion?
1s2 2s2 2p6 3s2 3p6
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p1
1s2 2s2 2p6 3s2 3p6 4s1
1s2 2s2 2p6 3s2 3p6 4s2 4p6
30
How many valence electrons are in an atom of phosphorus?
5
3
4
2
31
Which of these elements does not exist as a diatomic molecule?
I
Ne
F
H
32
What is the formula for phosphoric acid?
H2PO3
HPO2
H3PO4
HPO4
33
Which of the following compounds contain the Mn
3+
ion?
MnO
MnBr2
MnS
Mn2O3
34
An example of an extensive property of matter is _____.
Pressure
Hardness
Temperature
Mass
35
What is the mass in grams of 5.90 mole C
8
H
18
?
19.4 g
0.0512 g
673 g
389 g
36
The calculation of quantities in chemical equations is called _____.
Stoichiometry
Dimensional Analysis
Percent Composition
Percent Yield
