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