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Semester 2 Exam

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Last updated over 3 years ago
60 questions
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8
Question 1
1.

Question 2
2.

Question 3
3.

Question 4
4.

Question 5
5.

Question 6
6.

Question 7
7.

Question 8
8.

Question 9
9.

Question 10
10.

Question 11
11.

Balance each chemical equation.
__RbNO3 + __BeF2 🡪 __Be(NO3)2 + __RbF
Balance the equation(type your answer in as 5, 6, 7, 8 separate the coefficients with commas).

Question 12
12.

Balance each chemical equation.
__Na3PO4 + __KOH 🡪 __NaOH + __K3PO4
Balance the equation(type your answer in as 5, 6, 7, 8 separate the coefficients with commas).

Question 13
13.

EXTRA CREDIT:
__AlI3 + __Mn(SO3)2 🡪 __Al2(SO3)3 + __MnI4

Balance the equation(type your answer in as 5, 6, 7, 8 separate the coefficients with commas).

Question 14
14.

Question 15
15.

Question 16
16.

Question 17
17.

Question 18
18.

Question 19
19.

Question 20
20.

Question 21
21.

Question 22
22.

Question 23
23.

Question 24
24.

Question 25
25.

Given 81.20 grams of CaF2 how many formula units in the sample?

Question 26
26.

What is the molar mass of acetic acid: HCH3COOH?

Question 27
27.

Given 5.012x1024 atoms of silicon, how many grams of silicon are in the sample?

Question 28
28.

Question 29
29.

Question 30
30.

Question 31
31.

Question 32
32.

Question 33
33.

Question 34
34.

Question 35
35.

Question 36
36.

Question 37
37.

Question 38
38.

Question 39
39.

Name the compound NS2

Question 40
40.

Name the compound PS3

Question 41
41.

Give the formula for the covalent compound tetrasulfide heptaoxide

Question 42
42.

What does the prefix nona- represent?

Question 43
43.

How many sigma bonds in the molecule?

Question 44
44.

Essay--Write the answer to one essay question in the space provided below.
FCA’s 1. Write in complete sentences and paragraph form.
2. Use Chapter 8 terminology to answer questions(example: hybridization, double bond, lone pairs, etc...).
3. Provide inferences, other thoughts, or personal experiences in your answer whenever possible.

#1 Explain why is PCl5 an exception to the octet rule, while PCl3 is not?

#2 Vanderwaal's forces, Dipole-Diple moment, and Hydrogen bonding are used to explain bonding between covalent compounds. Explain which is the strongest of the three bonding forces and how the molecules bond according to this force.

#3 Explain why Lithium(III) chloric is not a correct name for the ionic compound formed between lithium and chlorine.

#4 Explain why it is not possible to write a correct chemical formula for the compound nitrogen hydride.

Question 45
45.

Question 46
46.

Question 47
47.

Question 48
48.

Question 49
49.

Question 50
50.

Question 51
51.

Question 52
52.

Question 53
53.

Question 54
54.

Question 55
55.

The name of the anion PO3-3 is ____________________ ion.

Question 56
56.

The name of the anion NO2-1 is ____________________ ion.

Question 57
57.

Write the chemical names for each of the following compound CaF2.

Question 58
58.

EXTRA CREDIT: Write the chemical name for the following compound NH4F.

Question 59
59.

Write the chemical formula for the following ionic compound: Barium iodide

Question 60
60.

EXTRA CREDIT:
__C3H4O3 + __O2 🡪__CO2 +__H2O

Balance the equation(type your answer in as 5, 6, 7, 8 separate the coefficients with commas).

Iron rusts according to the following equation: __ Fe(s) + __ O2(g) → __ Fe2O3(s)
Balance the equation(type your answer in as 5, 6, 7 separate the coefficients with commas).
1, 3, 2
4, 3, 2
4, 2, 3
1, 2, 3
Given the following chemical equation.
__ Fe(s) + __ O2(g) → __ Fe2O3(s)
Identify the type of chemical reaction.
single replacement
combustion reaction
decomposition reaction
double replacement
synthesis/combination reaction
Given the following chemical equation.
____ C5H12(g) →____ C(g) + ____ CH4(g)
Identify the type of chemical reaction.
decomposition reaction
synthesis/combination reaction
combustion reaction
double replacement
single replacement
Given the following chemical equation.
____ Sr(s) + ____ F2(g) →____ SrF2(s)
Identify the type of chemical reaction.
single replacement
decomposition reaction
double replacement
synthesis/combination reaction
combustion reaction
Given the following chemical equation.
____ Al2(CO3)3(s) → ____ Al2O3(s) + ____ CO2(g)
Identify the type of chemical reaction.
decomposition reaction
synthesis/combination reaction
combustion reaction
double replacement
single replacement
Balance each chemical equation.
____ Ni2S3(s) → ____ Ni(s) + ____ S(s)
Balance the equation(type your answer in as 5, 6, 7 separate the coefficients with commas).
1, 2, 3
1, 3, 3
1, 1, 3
2, 2, 3
Given the following chemical equation.
____ Ni2S3(s) → ____ Ni(s) + ____ S(s)
Identify the type of chemical reaction.
double replacement
combustion reaction
synthesis reaction
decomposition reaction
single replacement
Given the following chemical equation.
_____C3H6(g) + ______O2(g) →______CO(g) + ______H2O(l)
Identify the type of chemical reaction.
decomposition reaction
double replacement
synthesis reaction
single replacement
combustion reaction
Given the following chemical equation.
_____C3H6(g) + ______O2(g) →______CO(g) + ______H2O(l)
Which substances are gases?
O2
C3H6
C3H6 and CO
O2 and CO
H2O
C3H6 and O2
C3H6 and O2 and CO
CO
Given the following chemical equation.
__Pb + __FeSO4 🡪 __PbSO4 + __Fe
Identify the type of chemical reaction.
decomposition reaction
double replacement
combustion reaction
synthesis reaction
single replacement
All of the following are equal to Avogadro's number EXCEPT ____.
the number of molecules in 1 mol of Nitrogen gas
the number of formula units of sodium fluoride in 1 mol NaF
the number of atoms of gold in 1 mol Au
the number of grams of bromine in 1 mol Br
1 mole CaCl₂ = 6.02 x1023 ______
ions
formula units
atoms
molecules
1 mole N₂ = 6.02 x1023 ______
atoms
molecules
ions
formula units
1 mole Cu = 6.02 x1023 ______
formula units
atoms
molecules
ions
Law of conservation of mass states...
mass is neither created nor destroyed
the percent by mass of each element in a compound
A starting material in a chemical reaction. On the left side of a chemical equation.
A list of elements organized according to the ease with which the elements undergo certain chemical reactions.
Molar Mass is
A chemical reaction that breaks down compounds into simpler products.
Burning. Oxygen gas is one of the reactants and water is one of the products.
The mass of 1 mole of any substance. Must use the periodic chart to obtain this value.
number of representative particles in a mole, 6.02 X 1023
What does avogadro's number tell us?
number of grams
number of moles
number of particles
number of protons
What information might be most useful for me to find molar mass?
number of electrons
atomic mass
atomic number
number of protons
What is Avogadro's number?
6.02*1023
1,796
30
336
Avogadro's number of representative particles is equal to one ____.
kelvin
mole
kilogram
gram
What is the molar mass of methane(CH4)?
1.008 g/mol
4.032 g/mol
12.011 g/mol
16.043 g/mol
Which combination of bonds is present in this molecule?

1 sigma bond and 2 pi bonds
1 sigma bond and 1 pi bond
2 pi bonds
1 sigma bond only
Which exception to the octet rule is shown by beryllium in this molecule?

expanded octet
suboctet
uneven number of valence electrons
coordinate covalent bond
Which one will NOT form a diatomic molecule?
boron
bromine
nitrogen
fluorine
Which type of bond has one pair of electrons shared between atoms?
single covalent
ionic bond
triple covalent
double covalent
In the compound PCl3, how many total valence electrons are present?
24
4
8
26
Which type of bond has an electronegativity difference greater than 1.7?
polar covalent
ionic
metallic
nonpolar covalent
How many pairs of bonding electrons are in a molecule that displays sp2 hybridization?
2
3
5
4
How many pairs of bonding electrons are present in a molecule that displays trigonal bipyramidal molecular shape?
6
5
3
4
What molecular shape does the compound CH4 have?
bent
tetrahedral
octahedral
trigonal planar
Which is the correct formula for the compound dinitrogen monoxide?
N2O2
N2O
(NO)2
NO2
Which is the formula for the compound sulfur hexachloride?
SCl6
S6Cl
SCl5
S2Cl3
Which is true of the model of metallic bonding shown in this figure?
Valence electrons are able to move easily among the metallic cations.
It results in the substance being very brittle and not easily deformed.
Heat and electricity are easily carried by the cations from one region to another.
Metallic atoms are present in a “sea” of negatively charged atoms.
Which is the charge that results when oxygen becomes an ion?
+2
+3
-2
-3
Which is a property of substances that exhibit metallic bonding?
high boiling points
rigid and brittle
poor conductors of electricity
low melting points
Which is a physical property of ionic compounds in their solid state?
weak attractive forces between ions
good conductor of electricity
high melting point
low boiling point
Which is the correct formula for the compound formed between beryllium and nitrogen?
Be3N
BeN
Be3N2
Be2N3
Which is the correct formula for the compound formed between lithium and sulfur?
LiS2
Li2S
Li2S2
LiS
Which is the correct formula for the compound Manganese (III) Fluoride?
MnF3
Mn3F
MnF3
MnF
Mn3F
Which is the correct name for the compound Fe2S3?
Iron (II) Sulfide (II)
Iron (III) Sulfide
Iron Sulfide
Iron (II) Sulfide
Which is the correct name for the compound CaClO3?
Calcium Chlorite
Calcium Chloroxide
Calcium Chlorate
Calcium Chloride
Which is the correct name for the compound Na3PO4?
Sodium (III) Phosphide
Sodium Phosphite
Sodium Phosphide
Sodium Phosphate