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2024 Chem PS Comp Review (concepts) Flashcards | StudBud
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2024 Chem PS Comp Review (concepts)
2024 Chem PS Comp Review (concepts)
80 terms
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comprehensive review
Flashcards
80 cards
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Practice quiz
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Questions
80
Answers
1
the total mass of the reactants equals the total mass of the products in a chemical reaction
True
False
2
Which ion(s) would not be present in the net ionic equation?
Na+, SO42-
none of these
Na+, OH-
Ba2+, SO42-
3
isotopes differ in their number of neutrons
True
False
4
synthesis and combination reactions are the same
False
True
5
Which of the following has the smallest atomic size: N, O, Ga, K
N
K
Ga
O
6
ionic bonds are typically formed between metals and nonmetals
True
False
7
A 65.0 g box has a density of 10.2 g/cm
3
. What is the ball's volume?
none of these
633 mL
0.157 cm3
6.37 mL
8
Name the following: HI (aq)
none of these
hydroiodic acid
hydrogen iodide
iodic acid
9
Elements in the same family contain the same number of electrons
True
False
10
molecular formulas are the lowest ratio by which elements combine
False
True
11
The correct name for NO
3
is
nitrate
nitrogen trioxide
none of these
nitrogen oxide
12
according to the kinetic molecular theory of gases, gases have random motions and spread out to fill their container
True
False
13
What do the following metric prefixes mean: milli, micro, nano
103, 10-5, 10-9
none of these
10-3, 10-6, 10-9
10-3, 10-5, 10-10
14
a catalyst is not a reactant, nor a product, but helps to speed up a reaction
False
True
15
solutions are homogeneous mixtures
True
False
16
How many electrons can exist in an orbital?
none of these
8
2
4
17
Classify the following type of reaction
redox
double displacement
neutralization
combination/synthesis
18
Express 0.000000172 in scientific notation
172 x 109
1.72 x 107
172 x 10-9
1.72 x 10-7
19
The coefficient for Fe
2
O
3
in the following equation is...
2
none of these
1
0
20
What is another name for positive ions? negative ions?
cation; anion
polyatomic; cation
anion; cation
polyatomic; anion
21
What statement best describes the image?
incorrect lewis structure - missing electrons
correct lewis structure
incorrect lewis structure - too many electrons
none of these
22
What type of reaction occurs between silver nitrate and sodium chloride?
oxidation-reduction
none of these
neutralization
precipitation
23
State the law of constant composition
matter cannot be created nor destroyed
samples of a given compound have same proportion of elements
samples of a given element are identical
none of these
24
Isotopes differ in their number of
none of these
protons
electrons
neutrons
25
Which elements are naturally diatomic
H O I F S Cl
H O N Cl Br I F
N O F
none of these
26
With other variables constant, how does specific heat constant relate to temp rise in a metal?
more info needed to determine
higher the constant, higher temp rise
lower the constant, higher temp rise
no effect
27
the oxidation state of Mn in KMnO
4
is 2+
True
False
28
Which of the following contains dipole-dipole forces?
ionic compounds
nonpolar covalent compounds
all of these
polar covalent compounds
29
Calculate the following; express with sig figs: 4.270 x 13.2 / 0.130
430
none of these
433.5
433.57
30
Which molecule has a polar covalent bond?
O2
none of these
H2O
KBr
31
Which of the following has hydrogen bonding?
CH4
H2Se
HBr
C2H5OH
32
a redox reaction occurs when protons change
True
False
33
ions differ in their number of protons
True
False
34
a precipitation reaction occurs when one of your reactants is insoluble
True
False
35
Which of the following items is a physical property
tarnishing of silver
corrosive action of acid rain on granite
odor of gasoline
combustion of gasoline
36
Light is emitted when and electron moves
from 3s to 3p
from 4p to 4s
from 4s to 4d
none of these
37
Identify what types of elements combine to make ionic, molecular, and metallic compounds
m/m; m/nm; nm/nm
m/nm; nm/nm; m/m
none of these
nm/nm; m/m; m/nm
38
The compounds CO and CO
2
formed from C and O is an example of:
none of these
law of constant composition
law of multiple proportions
law of conservation of mass
39
What element is represented by the following electron configuration?
As
P
V
none of these
40
State the #1 rule of solubility
like dissolves like in terms of atom structure
like dissolves like in terms of bonding
increasing temp will decrease solubility
increasing temp will increase solubility
41
What types of forces exist between fluoride molecules?
dispersion
hydrogen
dipole-dipole
ion-dipole
42
What is the molecular geometry of NH
3
?
trigonal pyramidal
linear
bent
none of these
43
hydrogen bonds occur between hydrogens on two adjacent molecules
False
True
44
How many valence electrons exist in a nitrogen atom?
7
5
none of these
17
45
Which of the following has only 8 protons?
O
Zn
Mg
C
46
Name the following: PCl
3
triphosphorus monochloride
phosphorous trichloride
phosphorus III chloride
none of these
47
Which of the following would you expect to have the highest boiling point: N
2
, HCl, H
2
O
HCl
they should all be nearly the same
N2
H2O
48
endothermic reactions give off energy
True
False
49
in order to satisfy the octet rule, chlorine needs one more electron in its 3p orbital
False
True
50
What happens to the pressure of a gas when you triple moles while keeping V & T constant
pressure is reduced 1/3
none of these
pressure triples
no change
51
What do the elements in a group have in common that relates to bonding?
same number of valence electrons
similar nuclear structure
same number of energy levels
none of these
52
a neutralization reaction occurs when you add an acid to a base and it forms a salt and water
False
True
53
The correct number of sig figs in 0.1002500 is:
5
none of these
4
7
54
Convert 257 mL to liters
0.257
2.57
25.7
none of these
55
What is the name of a compound made from sodium and oxygen?
sodium I oxide
none of these
sodium dioxide
sodium oxide
56
Which of the following has the highest ionization energy: Mg, Cs, I, F
Mg
I
F
Cs
57
Which of the following has the highest electronegativity: Xe, Al, Sr, P
Al
Xe
Sr
P
58
molecular bonded molecules tend to have low melting points
False
True
59
Which has the largest atomic size?
Al
Cl
F
B
60
An anion is formed when
an atom loses electrons
none of these
an atom gains electrons
an atom differs in the number of neutrons
61
Which of the following atoms has the highest electronegativity?
Na
O
Li
N
62
When water is heated, bubbles form in the water. Is this evidence of a chemical reaction?
yes, the formation of a gas is always a chemical change
no, phase changes are not chemical changes
yes, the formation of a gas is proof of a new compound
no, the formation of a gas is a secondary byproduct
63
What is the angle between electron groups in the tetrahedral electron geometry?
109.5
180
120
none of these
64
Solutions can be classified as:
Homogeneous
Colloidal
Heterogeneous
Suspension
65
What is the full ionic equation for the reaction of sodium metal plus chlorine gas
2 Na(s) + Cl2(g) --> 2 NaCl(aq)
2 Na(s) + Cl2(g) --> 2Na+(aq) + 2Cl-(aq)
2 Na(s) + 2 Cl-(g) --> 2 Na+(aq) + 2 Cl-(aq)
none of these
66
Which of the following does not contain chemicals?
air
all of these contain chemicals
organically grown vegetables
all natural drain cleaner
67
What is the formula for a compound formed from strontium and nitrogen?
SrN
none of these
Sr2N3
Sr2N2
68
Predict the precipitate when barium chloride is mixed with calcium sulfate
barium chloride
barium sulfate
none of these
calcium chlride
69
How many electrons exist in a sulfur ion?
4
16
6
18
70
you are amazing!
False
True
71
tea is an example of a pure substance
False
True
72
What element on the periodic table is most similar to Li? Why?
none of these are similar
He - noble gas closest to Li
Mg - has one more proton and electron
K - same number of valence electrons
73
What is the electron goemetry if you have 1 electron group around the center atom with 2 atoms attached?
trigonal planar
none of these
linear
trigonal bipyramidal
74
an aluminum ion contains: 13 protons, 13 electrons, and 14 neutrons
False
True
75
the number of protons determines the identity of an element
False
True
76
What is the net ionic equation for the reaction of hydrofluoric acid with potassium hydroxide
none of these
F- + K+ --> KF
H+ + OH- --> H2O
H+ + F- + K+ + OH- --> KF + H2O
77
What type of energy is energy of position?
potential
kinetic
none of these
both kinetic and potential
78
What is the formula mass for dinitrogen trisulfide?
none of these
124.19 amu
127.98 amu
106.14 amu
79
How many neutrons are contained in B-10?
10
5
6
none of these
80
10. g of paper was burned; the ashes weighed 0.45 g. What happened to the rest?
none of these
remaining was converted into heat
remaining was converted into gases
remaining mass was destroyed
