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Chemistry Final exam practice - part 2 Q pool

Total questions: 152

Worksheet time: 4hrs 40mins

Name
Class
Date
1.
How many electrons are shared in a triple bond?
a)
6
b)
3
c)
6 pairs
d)
5
2.
How many are shared in a double bond?
a)
2
b)
4 pairs
c)
6
d)
4
3.
How many are shared in a single bond?
a)
2 pairs
b)
4
c)
2
d)
1
4.
What two types of atoms make a covalent bond?
a)
2 Nonmetals
b)
1 Nonmetal and 1 Metal
c)
2 Metals
d)
2 Noble Gases
5.
Is this image an example of covalent bonding?
a)
Yes
b)
No
6.

The formation of a covalent bond relies on the interaction or bonding of...

a)

2 Nonmetals

b)

1 Nonmetal & 1 Metal

c)

2 Metals

d)

2 Noble Gases

7.

How do covalent bonds form?

a)

Donating & receiving valence electrons between atoms

b)

Oppositely charged ions attract each other & form bonds

c)

Scientists are still not sure how they form

d)

Sharing valence electrons between atoms

8.

What number do the diatomic elements form on the periodic table?

a)

7

b)

1

c)

2

9.

Is O2 a diatomic element?

a)

Yes

b)

No

10.

What are the seven diatomic elements?

a)

H2, Cl2, Br2, O2, N2, I2, F2

b)

H2, Cl2, I2, F2, Hg2, Br2, Fe2

c)

H2, Cu2, Ni2, B2, O2, I2, Fe2

11.
Bonds between two nonmetal atoms are 
a)
covalent.
b)
ionic.
c)
incomplete.
d)
complete.
12.
In a polar covalent bond, electrons are shared ___________.
a)
equally
b)
unequally
c)
between non-metals with similar electronegativities
d)
between a metal and a non-metal
13.
If Boron bonds with Hydrogen, a ____________ bond forms.
a)
polar covalent
b)
nonpolar covalent
c)
metallic
d)
ionic
14.

Which pair of atoms has the most polar bond?

a)

H-Br

b)

H-Cl

c)

I-Br

d)

I-Cl

15.

Which bond is most polar?

a)

C-O

b)

H-O

c)

N-O

d)

S-O

16.

Which molecule has a non-polar covalent bond?

a)

H2

b)

NH3

c)

H2O

d)

HCl

17.

The chemical bonds between which two atoms is the most polar?

a)

C-N

b)

H-H

c)

S-Cl

d)

Si-O

18.

The least polar bond is found in a molecule of

a)

HI

b)

HF

c)

HCl

d)

HBr

19.

Which bond is most polar?

a)

C-O

b)

H-O

c)

N-O

d)

S-O

20.

Which formula represents a molecule with the most polar bond?

a)

CO

b)

NO

c)

HI

d)

HCl

21.

Which molecule has a non-polar covalent bond?

a)

H2

b)

NH3

c)

H2O

d)

HCl

22.

The chemical bonds between which two atoms is the most polar?

a)

C-N

b)

H-H

c)

S-Cl

d)

Si-O

23.
NaCl
a)
Ionic
b)
Covalent
c)
Metallic
d)
Polyatomic Ion 
24.
MgCl2
a)
Ionic
b)
Covalent
c)
Polyatomic Ion
d)
Metallic 
25.

Classify ionic or molecular

LiOH

a)

Ionic

b)

Molecular

26.

Classify ionic or molecular

C2H2

a)

Ionic

b)

Molecular

27.
Which following is a molecular compound?
a)
SO2
b)
K2O
c)
CaO
d)
BeO
28.
What types of elements combine to form a molecular compound?
a)
two or more metals
b)
two or more different nonmetals
c)
a metal and a non-metal
d)
two of the same nonmetal
29.

............................. is a neutral group of atoms joined together by covalent bonds.

a)

A molecule

b)

A formula unit

c)

An ionic group

30.

A molecular formula shows how many .............. of each element a substance contains.

a)

atoms

b)

electrons

c)

protons

31.

A compound composed of molecules is called ..................... compound

a)

a molecular

b)

an ionic

c)

a metalic

32.
In a polar covalent bond, electrons are shared ___________.
a)
equally
b)
unequally
c)
between non-metals with similar electronegativities
d)
between a metal and a non-metal
33.
Which molecule contains bonds with a GREATER polarity?
a)
HCl
b)
CCl4
34.
Which molecule contains bonds of GREATER polarity?
a)
H2O
b)
OF2
35.
A diatomic molecule like O2 is always_______ because electrons are shared ________.
a)
nonpolar; equally
b)
polar; equally
c)
nonpolar; unequally
d)
nonpolar; unequally
36.
If Boron bonds with Hydrogen, a ____________ bond forms.
a)
polar covalent
b)
nonpolar covalent
c)
metallic
d)
ionic
37.
If Bromine bonds with Hydrogen, a ____________ bond forms.
a)
polar covalent
b)
nonpolar covalent
c)
metallic
d)
ionic
38.

Which type of bond occurs between non metals?

a)

covalent bonds

b)

ionic bonds

c)

metallic bonds

d)

all types of bonds

39.

The most electronegative element is

a)

Chlorine

b)

Fluorine

c)

Iodine

d)

Sodium

40.
phosphorus trichloride
a)
KCl3
b)
PCl3
c)
K3Cl
d)
P3Cl
41.
silicon dioxide
a)
SO2
b)
NaO2
c)
SiO2
d)
SiO
42.
SiCl4
a)
silicon tetrachloride
b)
silicon quadchloride
c)
monosilicon tetrachloride
d)
silicon chloride
43.
The chemical formula of sulfur hexabromide is
a)
SBr₆
b)
S₆Br
c)
S(VI)Br
d)
S6Br
44.
The chemical formula of dinitrogen textroxide is
a)
Ni₂O₄
b)
NiO
c)
N₂O₄
d)
NiO₂
45.
The chemical formula of carbon tetrachloride is
a)
CCl
b)
C₄Cl
c)
CCl₄
d)
C(IV)Cl
46.
The chemical formula of tetraphosphorus heptaoxide is
a)
F₄O₁₀
b)
P₄O7
c)
PO
d)
P₁₀O₄
47.
The name of SO₃ compound is
a)
sulfate
b)
sulfur oxide
c)
sulfur trioxide
d)
monosulfur trioxide
48.
What's the formula for chlorine dioxide
a)
ClO2
b)
CLO
c)
ClO3
d)
HClO2
49.
What is the formula for Hexaboron Monosilicide
a)
B6Si
b)
BSi
c)
BSi6
d)
B6Si6
50.
The covalent compound N2O5 would be named
a)
nitrogen oxide.
b)
dinitrogen oxide.
c)
nitrogen pentoxide.
d)
dinitrogen pentoxide.
51.
phosphorus trichloride
a)
KCl3
b)
PCl3
c)
K3Cl
d)
P3Cl
52.
What is the OFFICIAL name for H2O
a)
Hydrogen Oxide
b)
Oxygen Dinitride
c)
Agua
d)
Dihydrogen Monoxide
53.

Name the molecular compound CO

a)

carbon monoxide

b)

monocarbon monoxide

c)

carbide

d)

oxygen carbide

54.

Name the following compound:

CO2

a)

monocarbon dioxide

b)

carbon oxide

c)

carbon dioxide

d)

oxygen carbonide

55.

What is the name for SiCl4?

a)

silicon tetrachloride

b)

silicon quadchloride

c)

monosilicon tetrachloride

d)

silicon chloride

56.

What is the correct Lewis Dot Structure for ammonia NH3

a)
b)
c)
d)
57.

Which is the correct molecular structure for carbon dioxide?

a)
b)
c)
d)
58.

Which Lewis Dot Model drawing correctly shows an O2 molecule?

a)
b)
c)
d)
59.
Which of the following is the correct Lewis dot structure for the molecule fluorine (F2)?
a)
A
b)
B
c)
C
d)
D
60.
In CO2, how many UNSHARED pairs of electrons does each oxygen have?
a)
2
b)
1
c)
4
d)
6
61.

How many pairs of UNSHARED electrons are shown in this image?

a)

1

b)

2

c)

3

d)

4

e)

0

62.

How many paired of SHARED electrons are shown in this image?

a)

1

b)

2

c)

3

d)

4

e)

0

63.

How many paired of UNSHARED electrons are shown in this image?

a)

1

b)

2

c)

3

d)

4

e)

0

64.
Which of the following is the correct Lewis structure for the compound PBr3?
a)
structure A
b)
structure B
c)
structure C
d)
structure D
65.
In the correct Lewis structure for CH4, how many unshared electron pairs surround the carbon?
a)
2
b)
8
c)
0
d)
4
66.

Which of these elements does not exist as a diatomic molecule?

a)

Ne

b)

F

c)

H

d)

I

67.
Which of the following is the correct Lewis structure for CH2O?
a)
Option A
b)
Option B
c)
Option C
d)
Option D
68.
In the correct Lewis structure for water, how many unshared pairs of electrons will oxygen have?
a)
1
b)
4
c)
3
d)
2
69.
Which LD Diagram is correct for chloromethane (CH3Cl)
a)
A
b)
B
c)
C
d)
D
70.

H2O has how many lone pairs?

a)

0

b)

1

c)

2

d)

3

71.
What is the only thing you can change when balancing equations?
a)
Subscripts
b)
order
c)
Coefficients
d)
Commercials
72.
what are the coefficients of the following equation
____Na + ____Cl  yields  _____ NaCl
a)
2:1:1
b)
1:1:1
c)
3:2:3
d)
5:6:1
73.
What are the smaller numbers that you CANNOT change in a chemical equation? 
a)
Coefficient
b)
Products
c)
Reactants
d)
Subscript
74.
What are the larger numbers that you CAN CHANGE in a chemical equation? 
a)
Coefficient 
b)
Products
c)
Reactants
d)
Subscripts
75.
How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
76.
Pb(NO3)2  +  KI --> PbI2 + KNO3
What type of reaction is this? 
a)
Synthesis 
b)
Decomposition 
c)
Single Replacement
d)
Double Replacement 
77.
What type of reaction is this?  
__H2O2 ---->  __H2O + O2
a)
Synthesis
b)
Decomposition 
c)
Single Replacement
d)
Combustion 
78.

Balance this equation: _Zn + _O2 --> _ZnO

a)

1, 1, 2

b)

2, 1, 2

c)

1, 1, 1

d)

2 ,2, 2

79.

How many water molecules do you need to balance the equation: __H20 --> 2H2 + O2?

a)

1

b)

2

c)

3

d)

0

80.

Which coefficients would balance this chemical equation? _Fe2O3 ---> _Fe + _O2

a)

2,1,2

b)

2,4,3

c)

1,1,1

d)

1,3,2

81.

Which coefficients would balance this chemical equation? _K + _Cl2 ---> _KCl

a)

1,1,1

b)

1,2,2

c)

1,1,2

d)

2,1,2

82.
__Na  +  O2 ----->  __Na2O
Type of reaction? 
Balance it too. :)
a)
Synthesis, 2Na /  4Na2O
b)
Decomposition, 4Na /  2Na2O
c)
Synthesis, 4Na /  2Na2O
d)
Decomposition, 2Na /  4Na2O
83.
What coefficient should be used to make the following equation balanced?
N2+O2--> _NO 
a)
1
b)
2
c)
3
d)
4
84.

What are the coefficients that would properly balance this equation?

__Ca + __H2O --> __Ca(OH)2 + __H2

a)

2,1 --> 2,1

b)

1,2 --> 1,1

c)

1,2 --> 2,4

d)

1,2 --> 2,1

85.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__CO + __Fe2O3--> __Fe + __CO2
a)
3,1 --> 2,3
b)
3,2 --> 1,1
c)
3,2 --> 2,4
d)
3,2 --> 2,1
86.

What are the coefficients that would properly balance this equation?

__H2 + __S --> __H2S

a)

1,1 --> 1

b)

2,2 --> 2

c)

1,2 --> 1

d)

1,2 --> 2

87.

What are the coefficients that would properly balance this equation?

__AgNO3 + __H2S --> __Ag2S+ __HNO3

a)

2,1 --> 1,2

b)

1,2 --> 1,1

c)

1,2 --> 1,2

d)

1,2 --> 2,1

88.

What are the coefficients that would properly balance this equation?

__Al + __O2--> __Al2O3

a)

4,1 --> 2

b)

4,3 --> 4

c)

3,4 --> 1

d)

4,3 --> 2

89.

Determine the coefficients to balance the equation.

__Al +__HCl --> __H2 +__AlCl3

a)

2,6,3,2

b)

it's already balanced

c)

4,12,3,4

d)

2,1,4,5

90.

Balance the the following equation.

__Zn+__HCl -->__ZnCl2 +__H2

a)

1,1,2,1

b)

1,1,1,2

c)

1,2,1,1

d)

2,1,1,1

91.
Which number should go in the blank?
Mn + _ HNO3 → Mn(NO3)2 + H2
a)
1
b)
2
c)
3
d)
0
92.

Choose the most correct sentence to describe the following reaction: Al2O3(s) --heat--> Al(s) + O2(g)

a)

Aluminum oxide thermally decomposes into aluminum and oxygen.

b)

Aluminum reacts with dioxygen to make aluminum oxide.

c)

Solid aluminum(II) oxygen make gas aluminum and oxygen.

d)

Solid aluminum oxide produces solid aluminum metal and oxygen gas when heated.

93.

Choose the most correct sentence to describe the following reaction: Fe(s) + O2(g) --> Fe2O3(s)

a)

An iron solution forms oxygen gas and solid iron oxide.

b)

Solid iron and oxygen gas react to form solid iron(III) oxide.

c)

Solid iron and oxygen make iron oxide.

d)

Iron and dioxygen gas produce solid iron(II) oxide.

94.

Choose the most correct sentence to describe the following reaction: NH3(g) + O2(g) --> NO(g) + H2O(g)

a)

Ammonia and oxygen form nitrogen and water

b)

Nitrogen trihydride and oxygen gases react to form nitrogen monoxide gas and water vapor.

c)

Nitrogen hydride gas and dioxygen gas produce nitrogen oxide and water when mixed.

d)

Nitrogen trihydride and oxygen react to make nitrogen oxide and dihydrogen monoxide.

95.

"When heated, solid mercury(II) oxide decomposes into mercury liquid and oxygen gas." What is the correct skelton equation for this reaction?

a)

Hg (l) + O2 (g) --> Hg2O (s)

b)

Hg2O (s) --> Hg (l) + O (g)

c)

HgO (s) --> Hg (l) + O2 (g)

96.

"Water and sulfur trioxide vapor combine to form sulfuric acid (or hydrogen sulfate solution)." Which is the correct skeleton equation?

a)

H2SO4 (s) --> H2O (l) + S3O (g)

b)

H2O (aq) + SO3 (g) --> H2SO4 (s)

c)

H2O (l) + S3O (v) --> H2SO4 (aq)

d)

H2O (l) + SO3 (g) --> H2SO4 (aq)

97.

"Solid zinc oxide is produced by combining zinc powder with oxygen gas." What is the correct skeleton equation for this reaction?

a)

ZnO (s) --> Zn (s) + O2 (g)

b)

ZnO (s) --> Zn + O (g)

c)

Zn (s) + O2 (g) --> ZnO (s)

d)

Zn + O --> ZnO

98.

Choose the most correct sentence to describe the following reaction: Fe(s) + O2(g) --> Fe2O3(s)

a)

An iron solution forms oxygen gas and solid iron oxide.

b)

Solid iron and oxygen gas react to form solid iron(III) oxide.

c)

Solid iron and oxygen make iron oxide.

d)

Iron and dioxygen gas produce solid iron(II) oxide.

99.

"Solid zinc oxide is produced by combining zinc powder with oxygen gas." What is the correct skeleton equation for this reaction?

a)

ZnO (s) --> Zn (s) + O2 (g)

b)

ZnO (s) --> Zn + O (g)

c)

Zn (s) + O2 (g) --> ZnO (s)

d)

Zn + O --> ZnO

100.
Which chemical reaction switches 2 elements?
a)
Double Replacement
b)
Single Replacement
c)
Combustion
d)
Decomposition
101.
Which chemical reaction breaks down into 2 substances?
a)
Double Replacement
b)
Single Replacement
c)
Synthesis
d)
Decomposition
102.
Which chemical reaction takes place when 2 substances react to form a single product?
a)
Decomposition
b)
Double Replacement
c)
Single Replacement
d)
Synthesis
103.
Classify
HI → H2 + I2
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
104.
Classify
Zn + H2S → ZnS + H2
a)
synthesis
b)
combustion
c)
single replacement
d)
double replacement
105.
Classify
CH4 + O2 → CO2 + H2O 
a)
single replacement
b)
double replacement
c)
synthesis
d)
combustion
106.
Classify
FeS + HCl → H2S + FeCl2
a)
synthesis
b)
combustion
c)
single replacement
d)
double replacement
107.
Classify
Fe + O2 → Fe2O3
a)
synthesis
b)
decomposition
c)
double replacement 
d)
single replacement
108.

Classify the following chemical reaction.


Si(s) + 2Cl2(g) --> SiCl4(l)

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

109.

Classify the follow chemical reaction.


2C6H6(l) + 15O2 --> 6H2O(l) + 12CO2(g)

a)

Composition/Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

110.
Classify
CH4 + O2 → CO2 + H2O 
a)
single replacement
b)
double replacement
c)
synthesis
d)
combustion
111.
2HI --> H2 + I2
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
112.
Mg + HCl --> MgCl2 + H2
a)
combustion
b)
synthesis
c)
decomposition
d)
single replacement
113.

Mg + N2 →Mg3N2

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Combustion

114.

Predict the products of this reaction: Al2(SO4)3 + Ca3(PO4)2 --->

a)

This reaction will not occur

b)

Al(PO4) + Ca(SO4)

c)

Al2Ca3 + (PO4)2(SO4)3

d)

Al2(SO4)3 + Ca3(SO4)3

115.

Predict the products of this reaction: AgF + KCl --->

a)

This reaction will not occur.

b)

AgCl + KF

c)

AgCl3 + KF2

d)

AgK + ClF

116.

What are the products of this reaction: Na(NO3) + CaF2 --->

a)

This reaction will not occur

b)

NaF + Ca(NO3)2

c)

NaF2 + Ca(NO3)

d)

NaCa + F(NO3)

117.

Predict the products of the following equation.

PbCl2 + AgNO3 ---->

a)

AgCl(s) + Pb(NO3)2(aq)

b)

No Reaction

c)

AgCl(aq) + Pb(NO3)2(s)

d)

AgCl(s) + PbNO3(aq)

118.

Predict the products fo the following equation.

CuCl2 + H2S ---->

a)

CuS(s) + HCl(aq)

b)

Cu2S(s) + HCl(aq)

c)

No reaction

d)

CuS(s) + HCl(s)

119.

Predict the products of the following reaction.


H2SO4 + BaCl2 ---->

a)

BaSO4(s) + HCl(aq)

b)

BaSO4(aq) + HCl(s)

c)

No Reaction

d)

ClSO4(aq) + BaH(s)

120.

In order for a double replacement reaction to occur, aqueous ions in solution must be removed from the solution. This can happen by the formation of

a)

a precipitate (solid)

b)

water

c)

a gas

d)

any of these

121.

Which of the following would be the correct formulas for the products of the following reaction:

F2 + FeCl3 →

a)

Cl2 + FeF3

b)

Cl2 + FeF2

c)

Fe + FCl

d)

no reaction would occur

122.

Which of the following would be the correct formulas for the products of the following reaction:

Pb + HCl →

a)

H2 + PbCl4

b)

H2 + PCl3

c)

H2 + PbCl

d)

no reaction would occur

123.

Which of the following would be the correct formulas for the products of the following reaction:

Mg + H2O →

a)

H2 + MgO

b)

H2 + Mg2O2

c)

H2 + Mg(OH)2

d)

no reaction would occur

124.

Predict the product(s) of this reaction:

Mg + HCl →

a)

MgCl + H2

b)

MgCl2 + H2

c)

MgCl2 + H

125.

What will be the result of : Zn + AuCl2->

a)

ZnCl2 +Au

b)

ZnAu + Cl2

c)

ClAu + Zn

126.

Predict the results: K + H2O -->

a)

K2OH

b)

KOH + H2

c)

K(OH)2

127.

Which of the following would be the correct formulas for the products of the following reaction:

F2 + FeCl3 →

a)

Cl2 + FeF3

b)

Cl2 + FeF2

c)

Fe + FCl

d)

no reaction would occur

128.
What will be the result of :  Zn + AuCl2->
a)
ZnCl2 +Au
b)
ZnAu + Cl2
c)
no reaction
d)
ClAu + Zn
129.
What are the products of this single replacement reaction: Mg + CuSO4
a)
Cu + MgSO4
b)
Cu + SO4Mg
c)
Cu + Mg(SO4)2
d)
No Reaction
130.

What is the final balanced equation for: Ca + F2 → ?Ca\ +\ F_2\ \rightarrow\ ?  

a)

Ca + F2 → CaF2Ca\ +\ F_2\ \rightarrow\ CaF_2  

b)

Ca + F2 → 2CaFCa\ +\ F_2\ \rightarrow\ 2CaF_{ }  

c)

2Ca + F2 → 2CaF22Ca\ +\ F_2\ \rightarrow\ 2CaF_2  

d)

2Ca + F2 → Ca2F22Ca_{ }\ +\ F_2\ \rightarrow\ Ca_2F_2  

131.

2 NO2 ---> 2 O2 + N2

a)

Synthesis

b)

Single Replacement

c)

Decomposition

d)

Combustion

132.

What type of reaction is illustrated below?

2HI --> H2 + I2

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

133.

What type of chemical reaction is this one?

Al(OH)3 --> Al2O3 + H2O

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

134.

What is the product for the synthesis reaction: Mg + Br2 →Mg\ +\ Br_2\ \rightarrow ?

a)

MgBrMgBr  

b)

MgBr2MgBr_2  

c)

Mg2BrMg_2Br  

d)

Mg2Br2Mg_2Br_2  

135.
Which of the following is an example of synthesis?
a)
Na + Br2 --> NaBr
b)
KClO3 --> KCl + O2
c)
HgO + Cl2-->HgCl + O2
d)
Cl2 + NaBr --> NaCl + Br2
136.

What are the products in the decomposition of magnesium hydroxide?

a)

magnesium oxide + hydrogen

b)

magnesium hydride + oxygen

c)

magnesium oxide + water

d)

magnesium hydride + water

137.
Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron (Fe) can be made from  6 moles H2? 
a)
4 moles Fe
b)
6 moles Fe
c)
9 moles Fe
d)
2 moles Fe
138.
2H2   +   O2  →  2H2O
How many moles of water can be produced if 8 moles H2 are used?
a)
4 moles
b)
8 moles
c)
16 moles
d)
2 moles
139.
N2 +  3H2 → 2NH3 
How many moles of hydrogen are needed to react with 2 moles of nitrogen?
a)

6 mol H

b)

2 mol H

c)

3 mol H

d)

1 mol H

140.
2H2   +   O2  →  2H2O
How many moles of water can be produced if 8 moles H2 are used?
a)
4 moles
b)
8 moles
c)
16 moles
d)
2 moles
141.
Mg(s) + 2 HCl(aq)  -->  MgCl₂(aq)   + H₂(g)
How many moles of HCl are consumed in the production of 7.5 moles of MgCl₂?
a)
3.8 moles
b)
15 moles
c)
7.5 moles
d)
23 moles
142.
Use the following equation:
NaIO3(aq) + 6HI(aq) --> 3I2(s) + NaI(aq) + 3H2O(l)
How many moles of iodine can be made from 6.55 moles of NaIO3?
a)
4.55 moles I2
b)
23.18 moles I2
c)
19.65 moles I2
d)
34.99 moles I2
143.
2H2   +   O2  →  2H2O
How many moles of water can be produced if 8 moles H2 are used?
a)
4 moles
b)
8 moles
c)
16 moles
d)
2 moles
144.
N2 +  3H2 → 2NH3 
How many moles of hydrogen are needed to react with 2 moles of nitrogen?
a)
6
b)
2
c)
3
d)
1
145.
CH4 + 2 O2 → CO2 + 2 H2O
How many moles of carbon dioxide are produced from the combustion of 110 g of CH4?
a)
13.7 mol
b)
2.75 mol
c)
6.11 mol
d)
6.85 mol
146.
Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 3 moles of Fe2O3?
a)
6 moles Fe
b)
4 moles Fe
c)
2 moles Fe
d)
1 moles Fe
147.
Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from  6 moles H2? 
a)
4 moles Fe
b)
6 moles Fe
c)
9 moles Fe
d)
2 moles Fe
148.
2H2   +   O2  →  2H2O
How many moles of water can be produced if 8 moles H2 are used?
a)
4 moles
b)
8 moles
c)
16 moles
d)
2 moles
149.

For the reaction

C2H4 + 3 O2 ⟶ 2 CO2 + H2O

If 5.5 mol of CO2 are produced, how many moles of O2 reacted?

a)

3.6 mol

b)

6.8 mol

c)

8.2 mol

d)

13.7 mol

150.

For the following equation

4NH3 + 7 O2 ⟶ 4 NO2 + 6 H2O

How many moles of ammonia are required to produce 11.9 moles of water?

a)

4.76 mol

b)

11.9 mol

c)

7.93 mol

d)

5.95 mol

151.

For the following equation

4NH3 + 7 O2 ⟶ 4 NO2 + 6 H2O

How many molecules of NO2 are produced when 5.38 moles of ammonia react completely?

a)

21.52

b)

6.48 x 1024

c)

3.24 x 1024

d)

247

152.
N2 +  3H2 → 2NH3 
How many moles of hydrogen are needed to react with 2 moles of nitrogen?
a)
6
b)
2
c)
3
d)
1

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