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Prof. Reel's CHM 090 Final Exam Review! (Spring 2021) Flashcards | StudBud
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Prof. Reel's CHM 090 Final Exam Review! (Spring 2021)
Prof. Reel's CHM 090 Final Exam Review! (Spring 2021)
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1
What is the molecular formula of the compound shown below?
C9H11NO
C10H13NO
C10H15NO
C8H9NO
2
Calculate the molar mass of NaNO
3
.
37 g/mol
85 g/mol
69 g/mol
53 g/mol
3
What is the correct formula for the ionic compound made from a metal
M
in Group 1 and a non-metal
Nm
in Group 16?
MNm2
M2Nm
MNm
MNm16
4
A solution with a pH of 10 would be:
basic, and have [H3O+] < [OH−]
acidic, and have [H3O+] < [OH−]
acidic, and have [H3O+] > [OH−]
basic, and have [H3O+] > [OH−]
5
Which of the following is an example of a homogeneous mixture?
A glass of water (H2O) made up of molecules containing H and O atoms
A spoonful of salt (NaCl), made up of Na+ and Cl− ions
A spoonful of salt (NaCl) dissolved in a glass of water (H2O)
A spoonful of salt (NaCl) mixed with a spoonful of sand (SiO2)
6
Rank the following three compounds by the strength of their intermolecular forces from strongest IMF to weakest IMF.
1 > 3 > 2
2 > 3 > 1
3 > 1 > 2
2 > 1 > 3
7
How much of a 19.0mg sample of radioisotope will remain after 8.4 hours, if the half-life is 1.2 hours?
9.5 mg
7.8 mg
0.15 mg
0.38 mg
8
Think of cooling a liquid until it freezes solid. Is this an endothermic or exothermic process, and why?
exothermic; heat is absorbed / taken in
endothermic; heat is expelled / given off
exothermic; heat is expelled / given off
endothermic; heat is absorbed / taken in
9
Polysaccharides, proteins, triglycerides, and nucleic acids are all built using which type of reaction?
dehydration synthesis
hydrogenation
hydrolysis
oxidation-reduction
10
What is the correct name for the compound Br
2
O?
dibromine monoxide
dibromine oxide
bromine dioxide
bromine oxide
11
Calculate the molarity of a solution made by dissolving 3.8 moles of solute in enough water to make 1.5 L of solution.
0.395 M
0.717 M
5.70 M
2.53 M
12
Solid iodine converts directly to gaseous iodine vapor when heated. What phase change is this?
vaporization
condensation
deposition
sublimation
13
Which of the following is a molecule but NOT a compound?
Na
CO2
H2O
O2
14
The chemical with the formula HCN is most likely to be a:
weak base
strong acid
strong base
weak acid
15
45 grams of H
2
O contains how many moles? (molar mass of H
2
O = 18 g/mol)
2.5 moles
810 moles
2.71×1025 moles
0.4 moles
16
What volume of a 12 M stock solution of hydrochloric acid would be needed to prepare 100 mL of 0.60 M solution?
13.9 mL
72 mL
0.2 mL
5.0 mL
17
Use q=mcΔT to calculate the energy needed to heat 50 grams of water by 30°C.
Specific heat of water = 4.184 J/g°C.
6.97 joules
6276 joules
0.143 joules
358.5 joules
18
Using the reaction P
4
+ 6 Cl
2
→ 4 PCl
3
and starting with 5 moles of P
4
and 36 moles of Cl
2
how much PCl
3
can be made?
20 moles of PCl3 can be made
5 moles of PCl3 can be made
36 moles of PCl3 can be made
24 moles of PCl3 can be made
19
Which of the following compounds would NOT behave as an electrolyte when dissolved in water?
C2H5O2N
Na2CO3
HCl
NH4OH
20
A model of the compound PH
3
is shown below. What is the molecular geometry of this compound?
tetrahedral
bent
trigonal pyramidal
trigonal planar
21
In the reaction 4 Fe + 3 O
2
→ 2 Fe
2
O
3
how many moles of Fe
2
O
3
can be produced using 20 moles of Fe (assuming enough O
2
)?
40 moles of Fe2O3
10 moles of Fe2O3
5 moles of Fe2O3
20 moles of Fe2O3
22
Which answer choice lists the steps of the scientific method in the correct order?
Experiment → Hypothesis → Observation → Conclusion → Analysis
Hypothesis → Experiment → Observation → Analysis → Conclusion
Analysis → Observation → Experiment → Conclusion → Hypothesis
Observation → Hypothesis → Experiment → Analysis → Conclusion
23
What is the overall ionic charge on a titanium (Ti) atom that has a total of 20 electrons?
+1
−2
+2
0
24
How many moles of gas are in a 2.0-liter container at a pressure of 6.5 atm and temperature of 330 K? (R = 0.08206)
88 moles
0.0032 moles
0.48 moles
2.1 moles
25
What is the correct name for the compound CaSO
4
?
calcium sulfate
calcium sulfide
calcium sulfoxide
calcium sulfur tetroxide
26
A nanogram is a unit that measures:
energy
mass
length
volume
27
Calculate the mass in grams of 0.428 moles of NaCl (molar mass = 58.4 g/mol).
0.00732 grams
58.44 grams
136.5 grams
25.0 grams
28
What is the name of the green shaded region labeled (d) in the periodic table below?
lanthanides
halogens
transition metals
metalloids
29
What are the products of the reaction of hydrobromic acid (HBr) with water?
OH+ and H2Br−
H2Br+ and OH−
H3O+ and Br−
H3BrO only
30
How many significant digits are in the value 0.01230 ?
three (3)
five (5)
six (6)
four (4)
31
Calculate the pH of a solution that has a hydroxide concentration of [OH
−
] = 1×10
−5
.
pH = −5
pH = 9
pH = −9
pH = 5
32
The bond which is formed between two amino acid monomers is called a ____________ bond.
hydrogen
glycosidic
ester
peptide
33
Which of the following biomolecules is most likely to be hydrophobic?
a lipid such as a triglyceride, which contains long hydrocarbon chains
none of the above would be hydrophobic -- they would all be hydrophilic
an amino acid, which contains an amine group and a carboxylic acid group
a monosaccharide such as glucose, which contains several alcohol groups
34
Which region of the periodic table contains elements that typically form cations with variable charges?
halogens
alkali metals
transition metals
metalloids
35
Based on the structures shown below, which compound would you expect to be the most hydrophilic?
Compound 2
Compound 3
Compound 1
none of these
36
2 NaOH → Na
2
O + H
2
O can be classified as what type of reaction?
decomposition
combustion
synthesis
single-replacement
37
Which of the following pH values would be the most acidic?
pH 7
pH 11
pH 5
pH 3
38
Classify the type of nuclear reaction that is shown below.
247
97
Bk +
1
0
n
→
135
52
Te +
110
45
Rh + 3
1
0
n
alpha decay
positron emission
fission
fusion
39
Other than the benzene ring in the middle, what is the other major functional group in the molecule shown below?
carboxylic acid
ester
aldehyde
alcohol
40
Based on the solubility rules, which of the following compounds is most likely to be INSOLUBLE in aqueous solution?
CaCl2
CaSO4
K2CO3
AgNO3
41
A gas has a pressure of 2.4 atm and initial volume of 10 L. If the volume is reduced to 5 L, what is the new pressure?
1.2 atm
20.8 atm
0.048 atm
4.8 atm
42
When writing the value 0.00710 in scientific notation, the correct form would be:
7.1×10−3
7.10×10−3
7.10×103
7.1×103
43
Which of the following is NOT a unit of measurement in the metric system?
cubic meter
kelvin
second
ounce
44
What salt is formed in this acid-base neutralization reaction? KOH + HNO
3
→
HOH
KH
KNO3
H2NO4−
45
What is the solvent in a mixture containing 18% chloroform, 53% ethanol, and 29% water?
both chloroform and water
chloroform
water
ethanol
46
Which of the following is both an element and a molecule?
Fe
NaCl
NH3
N2
47
Which type of radiation has the highest ionizing power?
beta radiation
alpha radiation
gamma radiation
positron emission
48
Compare the three structural formulas shown below. Which compounds (if any) are isomers?
compounds 1 and 3 are isomers
none of these compounds are isomers
compounds 2 and 3 are isomers
compounds 1 and 2 are isomers
49
Convert: 300 mL = __________ L
0.3 L
300,000 L
3 L
0.03 L
50
Which of the following is a physical property?
Iron will react with steam to produce hydrogen gas
Iron will easily dissolve in weak or dilute acids
Iron will oxidize in air, forming brown iron oxide (aka rust)
Iron will start to melt at a temperature of 1536°C
51
How many electrons would aluminum (Al) have to gain or lose to reach a noble gas configuration?
lose 3 electrons
lose 1 electron
gain 1 electron
gain 3 electrons
52
Which type of radiation has the highest penetrating power?
alpha radiation
gamma radiation
beta radiation
positron emission
53
One isotope of the element chlorine (Cl) has atomic number 17 and mass number 37. This means that the isotope has:
17 protons and 37 neutrons
17 neutrons and 20 protons
17 neutrons and 37 protons
17 protons and 20 neutrons
54
Based on electronegativity differences, a bond between the elements Carbon (2.55) and Hydrogen (2.20) would be:
ionic
non-polar covalent
polar covalent
pure covalent
55
What type of particle completes this nuclear equation?
247
96
Cm →
247
97
Bk + ?
beta particle (0−1e)
positron (0+1e)
alpha particle (42He)
proton (11p)
56
Which one of the following ionic compounds is NOT correctly charge-balanced?
K2CO3
Na(PO4)3
Al2(SO4)3
Ca(NO3)2
57
Which group of elements in the periodic table typically forms ions with a +1 charge?
alkali metals
transition metals
halogens
noble gases
58
The scientific method starts with a ___________
Experiment
Question or Observation
Theory
Hypothesis
59
Which type of biomolecule is characterized by the presence of an amine group, a carboxylic acid group, and a side chain?
nucleic acids
amino acids
fatty acids
monosaccharides
60
Considering significant figures, which of the following measurements has the highest precision?
0.500 L
500.00 mL
0.5 L
500 mL
61
How many CO
2
molecules are in 0.5 moles of CO
2
? (Avogadro's # = 6.022×10
23
things per mole)
3.011×1023 CO2 molecules
5.399×1025 CO2 molecules
1.325×1025 CO2 molecules
6.843×1021 CO2 molecules
62
Based on the following chemical reaction: CH
3
NH
2
+ H
2
O
⇄
CH
3
NH
3
+
+ OH
−
the compound CH
3
NH
2
is most likely to be a:
strong base
weak base
strong acid
weak acid
63
What is the correct formula for the ionic compound made from Ca
2+
ions and N
3−
ions?
Ca2N3
Ca3N2
Ca6N6
CaN
64
A kilojoule is a unit that measures:
volume
energy
mass
temperature
65
Which of the following would cause the pressure of a sample of gas to decrease?
an increase in volume
an increase in temperature
a decrease in volume
adding more gas to the sample
66
C
2
H
5
OH + 3 O
2
→ 2 CO
2
+ 3 H
2
O can be classified as what type of reaction?
decomposition
combustion
synthesis
double-replacement
67
Which one of the following is a covalent (molecular) compound?
NH4OH
Na3N
NaNO3
NO2
68
What percent of a sample of radioactive material with a half-life of 4.2 weeks will remain after 21 weeks have passed?
50%
12.5%
0.03%
3.1%
69
Based on the model of the PH
3
molecule shown below, is this compound overall polar or overall non-polar?
overall polar
overall non-polar
both
not enough information to determine
70
What is the coefficient in front of O
2
after balancing the reaction? __C
3
H
8
+ __O
2
→ __CO
2
+ __H
2
O
1
5
10
3
71
Other than the benzene ring, what functional groups are present in ephedrine, shown below?
alcohol and amine
ether and amide
alcohol and amide
ether and amine
72
How many valence electrons does a neutral phosphorus (P) atom have?
3
15
5
8
73
What is 85 cm, converted to meters?
8500 m
850 m
0.085 m
0.85 m
74
Which of the following functional groups would typically have the weakest intermolecular forces?
an alkene
an amide
an alcohol
a carboxylic acid
75
What is the coefficient in front of KBr after balancing? __KBrO
3
→ __KBr + __O
2
1
6
3
2
76
When writing the value 299800000 in scientific notation, the correct form would be:
2.998×10−8
2998.00000×105
2.99800000×10−8
2.998×108
77
Round the value 15,862 to three significant figures:
15,900
159
15,800
158
78
When aqueous Ba(NO
3
)
2
is mixed with aqueous Na
2
CO
3
a precipitate forms. Identify the solid precipitate of this reaction.
Na2Ba
BaCO3
CO3(NO3)2
NaNO3
79
What is the density of a piece of metal with mass of 30.0 grams and volume of 3.4 mL?
102 g/mL
0.11 g/mL
2.9 g/mL
8.8 g/mL
