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Final Exam Review Chemistry Template
Final Exam Review Chemistry Template
53 terms
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Final exam review for College Prep Chemistry
Flashcards
53 cards
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Practice quiz
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Questions
53
Answers
1
Which statement is true if 12 mol of CO and 12 mol of Fe
2
O
3
react? 3CO + Fe
2
O
3
--> 2Fe + 3CO
2
The limiting reactant is Fe2O3 and 24 mol of Fe will form
the limiting reactant is CO and 8.0 mol of Fe will be formed
The limitng reactant is Fe2O3 and 36 mol of CO2 will form
the limiting reactant is CO and 3.0 mol of CO2 will form
2
At STP, how many liters of oxygen will react with 3.6 liters of hydrogen? 2H
2
+ O
2
--> 2H
2
O
3.6 L
2.4 L
1.8 L
2.0 L
3
Which of the forces of intermolecular attraction are the weakest?
london dispersion
ionic bonding
hydrogen bonding
dipole-dipole
4
How do gas particles respond to an increase in volume?
incrase in kinetic energy and decrease in temperature
increase in kinetic energy and increase in temperature
decrease in kinetic energy and decrease in pressure
increase in temperature and increase in pressure
5
2 H
2
+ O
2
--> 2 H
2
O [what mass of water is produced from 2.0 mol of H
2
]
32 g
9 g
18 g
36 g
6
The reaction 2Fe + 3Cl
2
--> 2FeCl
3
is an example of which type of reaction?
combustion
decomposition
single-replacement
synthesis
7
What causes dipole-dipole interaction?
bonding of a covalently bonded hydrogen to electrons
attractions between ions
attractions between polar molecules
sharing electron pairs
8
If temperature is constant, the relationship between pressure and volume is
inverse
direct
9
2 Al + 3 CuSO
4
--> Al
2
(SO
4
)
3
+ 3 Cu [how many grams of Cu form from reaction of 51g of Al?]
2.8 g
81 g
180 g
0.045 g
10
The equation H
3
PO
4
+ 3KOH --> K
3
PO
3
+ 3H
2
O is what type of reaction?
single-replacement
synthesis
decomposition
double-replacement
11
How many grams of O
2
are produced if 11.5 g NO
2
are formed? 2Pb(NO
3
)
2
--> 2PbO + 4NO
2
+ O
2
32.0 g
2.00 g
2.88 g
1.00 g
12
A chemical bond that is formed when two atoms share electrons is called a(n):
ionic bond
covalent bond
polyatomic bond
compound
13
When aluminum nitrate reacts with lithium sulfate, the correct products would be:
Al2(SO4)3 and LiNO3
AlLi2 and SO4(NO3)3
AlSO4 and Li2(NO3)3
Al(NO3)3 and Li2SO<font size="2">4</font>
14
What is a double bond?
Two pairs of electrons shared between two atoms
One pair of electrons shared between two atoms
Two pairs of electrons shared between four atoms
A bond between two atoms and six electrons
15
Given the reaction 2H
2
+ O
2
--> 2 H
2
O .......
110 L
61 L
19.25 L
77 L
16
In the reaction 2CO + O
2
--> 2CO
2
what is the ratio of moles of oxygen to moles to CO
2
?
1:2
1:1
2:1
2:2
17
True or false: A double bond involves two pairs of electrons
False
True
18
According to VSEPR, molecules adjust their shapes to keep ___ as far apart as possible
mobile electrons
pairs of valence electrons
electrons closest to the nuclei
inner shell electrons
19
What is the chemical name for the compound with the formula Na
2
S?
Sodium Sulfide
Magnesium fluoride
Sodium fluoride
Lithium Oxide
20
Carbon Monoxide has the following VSEPR shape
tetrahedral
bent
linear
trigonal planar
21
How many valence electrons are in an atom of magnesium?
5
2
4
3
22
Answer the following question using a gas law:
2.00 L
4.35 L
5.15 L
2.19 L
23
One way to increase the pressure of a gas is to
lower the kinetic energy of gas molecules
decrease temperature
increase the number of gas particles
increase volume
24
How many valence electrons are in an atom of phosphorus?
3
5
2
4
25
Which of the following elements does NOT form an ion with a charge of +1?
fluorine
potassium
sodium
hydrogen
26
Given the equation 2 H
2
+ O
2
--> 2H
2
O ........
8.15 mL
19.30 L
4.075 L
8.15 L
27
True or false: Hydrogen bonding results in low surface tension because it is the weakest IMF
False
True
28
What are the missing coefficients for the equation: Cr + Fe(NO
3
)
2
--> Fe + Cr(NO
3
)
3
1,3,3,1
2,3,2,3
4,6,6,2
2,3,3,2
29
How many moles of aluminum are needed to react completely with 1.2 mol of FeO? (*mole ratio*)
1.6 mol
0.8 mole
2.4 mol
1.2 mole
30
How much PH
3
is formed if you have 6.2 g of P
4
and 4.0 g of H
2
: P
4
+ 6H
2
--> 4PH
3
6.8 g
270 g
45 g
.43 g
31
Us the activity series to predict the products of: Ag + KNO
3
--> _____
AgKNO3
No reaction
AgNO3 + K
AgK + NO3
32
A molecule with a single covalent bond is:
N2
CO
Cl2
CO2
33
Which of the following covalent bonds is most polar?
H-N
H-H
H-F
H-C
34
What are standard temperature and pressure conditions for gases?
-273°C and 1 atm
0°C and 760 torr
0 K and 760 Torr
0° and 0 torr
35
If pressure of a gas is increased and volume is constant, what will happen to temperature?
stay the same
increase
decrease
36
The equation Mg + 2HCl --> MgCl
2
+ H
2
is an example of what type of reaction?
single-replacement
double-replacement
decomposition
combination
37
True or false: N
2
is an example of a compound with a triple bond
True
False
38
Nitrogen tri-chloride has the following VSEPR shape:
bent
tetrahedral
trigonal planar
trigonal pyramidal
39
A covalent bond in which electrons are shared unequally is:
A double bond
Polyatomic
Ionic
Polar
40
What is the formula for sodium nitride?
Na3N
NaN3
Na2N
NaN
41
What is the coefficient for Cl
2
in the equation: Fe + Cl
2
--> FeCl
3
1
3
4
2
42
If 3.0 L of helium at 20.0° C is allowed to expant to 4.4 L, what is the new temperature?
-30°C
702°C
430°C
157°C
43
The octet rule states that, in chemical compounds, atoms tend to have ____
eight electrons in their principal energy level
more protons than electrons
more electrons than protons
the electron configuration of a noble gas
44
The shape of methane, CH
4
, is:
trigonal planar
bent
tetrahedral
square
45
Cobalt (III) chloride reacts with lithium hydroxide in double replacement: which is a product?
Co(OH)3
LiCl3
Co(OH)2
LiCo3
46
What is the coefficient for HCl in the equation: Mg + HCl --> MgCl
2
+ H
2
6
2
3
1
47
Carbon dioxide has the following VSEPR shape and polarity
Linear, polar
Linear, Non-polar
Bent, non-polar
Bent, Non-polar
48
What are the coefficients that will balance the equation: N
2
+ H
2
--> NH
3
3,1,2
1,3,2
1,3,3
1,1,2
49
What are the coefficients that will balance the equation: AlCl
3
+ NaOH --> Al(OH)
3
+ NaCl?
3,1,3,1
1,1,1,3
1,3,3,1
1,3,1,3
50
If pressure is constant, the relationship between temperature and volume is
inverse
direct
51
CH
4
+ 2 O
2
--> 2 H
2
O + CO
2
[16 g of CH
4
reacts and actually produces 41g CO
2
. What is % yield?]
2.6%
39%
1.1%
93%
52
What is % yield if 9.9 g Pb(NO
3
)
2
are heated &give 5.5 g of PbO? 2Pb(NO
3
)
2
--> 2PbO + 4NO
2
+ O
2
44%
67%
56%
82%
53
Answer the following gas law problem
.0658 kPa
.0658 atm
.0329 atm
.0329 kPa
