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Chemistry Fall Final Review Flashcards | StudBud
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Chemistry Fall Final Review
Chemistry Fall Final Review
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Review for the Regents of Chemistry.
Flashcards
30 cards
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Practice quiz
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Host live
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Questions
30
Answers
1
Which gas law relationship does the following graph represent?
P and V (Boyle's Law)
V and T (Charles's Law)
P and T (Gay-Lussac's Law)
2
As a sample of matter vaporizes, what occurs?
Kinetic energy increases, potential energy remains constant
Kinetic energy decreases, potential energy remains constant
Kinetic energy remains constant, potential energy increases
Kinetic energy remains constant, potential energy decreases
3
Measured value: 15.25. Accepted value: 15.375. What is the percent error?
0.81%
0.08%
8%
0.82%
4
A sample of hydrogen gas will behave most like an ideal gas under the conditions of...
High pressure and low temperature
Low pressure and low temperature
Low pressure and high temperature
High pressure and high temperature
5
Which trend
increases
as you consider the first five elements in period 4 on the periodic table?
metallic character
number of first shell electrons
atomic radius
electronegativity
6
Round 24.57 to 3 significant figures
24.6
25.0
24.0
24.5
7
What is the total number of different elements present in NH
4
NO
3
?
7
3
9
4
8
Which phase change is exothermic?
Liquid to gas
Liquid to solid
Solid to liquid
Solid to gas
9
Matter is classified as a...
Substance or as a mixture of substances
Homogeneous mixture, only
Homogeneous mixture or as a heterogeneous mixture
Substance, only
10
All phosphorus atoms have the same...
Number of neutrons plus the number of protons
Mass number
Atomic number
Number of neutrons plus the number of electrons
11
Using Table H, what is the boiling point of ethanol?
55°C
117°C
78°C
100°C
12
According to the kinetic molecular theory for an ideal gas, all gas particles...
are separated by small distances relative to their sizes
have collisions that decrease the total energy of the system
are in random, constant, straight-line motion
have strong intermolecular forces
13
Which sample has the
least
distance between the molecules?
KBr(aq)
Br2(l)
Br2(g)
KBr(s)
14
Which sample of CO
2
has a definite shape and a definite volume?
CO2(g)
CO2(l)
CO2(aq)
CO2(s)
15
Which element is
least
likely to undergo a chemical reaction?
Lithium
Carbon
Neon
Fluorine
16
What occurs when potassium reacts with chlorine to form potassium chloride?
Protons are shared and the bonding is covalent
Electrons are transferred and the bonding is ionic
Electrons are transferred and the bonding is covalent
Electrons are shared and the bonding is ionic
17
Which statement describes a chemical property of silicon?
Silicon has a blue-gray color
Silicon melts at 1414oC
Silicon is a brittle solid at 20oC
Silicon reacts with fluorine
18
What is the overall charge of an ion that has 12 protons, 10 electrons, and 14 neutrons?
4-
2+
2-
4+
19
What is 0.0561 in proper scientific notation?
561 x 10-4
561 x 104
5.61 x 102
5.61 x 10-2
20
What is 345K in Celsius?
72°C
345°C
618°C
273°C
21
Heat Of Fusion is...
the amount of joules needed to change from a solid to a liquid
fusing heat to another chemical
heat fusing with cold to make room temperature
um idk man
22
The average mass of all the isotopes for a given atom is called ___________.
average atomic mass
average atomic number
average mass number
average nuclear mass
23
How much energy does it take to vaporize one gram of water?
334 J
101.3 J
2260 J
4.18 J
24
The elements on the Periodic Table are arranged in order of increasing...
Number of isotopes
Number of valance electrons
Mass number
Atomic number
25
Which process is commonly used to separate a mixture of saltwater and sand?
chromatography
distillation
filtration
evaporation
26
As a result of the gold foil experiment, it was concluded that an atom...
Contains protons, neutrons, and electrons
Has positrons and orbitals
Is a hard, indivisible sphere
Contains a small, dense nucleus
27
What do Lewis dot structures show?
The truth
The outer valence electrons
Nothing
All of the electrons
28
Two grams potassium chloride are completely dissolved in a sample of water in a beaker to form
an element
a homogeneous mixture
a heterogeneous mixture
a compound
29
Which of the following shows a metal, nonmetal, and metalloid?
Ba, Cu, Zn
Na, B, F
H, Ne, Fe
N, O, S
30
Which particles have approximately the same mass?
A neutron and a proton
An electron and a proton
An electron and an aplha particle
A neutron and an alpha particle
