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5 questions. All MCQ’S. These questions are not able to be googled easily. Requires basic knowledge of conservation of mass and balancing chemical equations.
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Attachments
Unit 5 Test.
Revised Version
Download and if possible print this test.
You will need a calculator, pen, and paper for this test.
Work out all the questions on this sheet first. When you are complete go to the assignment called Unit 5 Test Entry.
There you will use the answers you came up with in this document to put into the Unit 5 Test Entry.
As always please read the questions carefully and use your notes, PowerPoints, the lab, and the k12 lessons.
Conservation of Mass 1.
C3H8O + O2 -> CO2 + H2O is an unbalanced reaction for the combustion of Isopropyl Alcohol.
The below table shows the measured beginning and ending mass of most of the reactants and products from combusting 1 mole of isopropyl Alcohol. Find the mass of the oxygen gas used in this reaction. Hint conservation of mass.
C3H8O
O2
CO2
H2O
60.0952g
204.0954g
72.06112g
A
144.0002g
B
264.1906g
C
216.06132g
D
132.15632g
E
None of the above are correct
Balancing Chemical Equations 1.
Balance the remainder of this equation for the combustion of 3C3H8O. Beware there is a google trap hidden in this question.
3C3H8O + __O2 -> __CO2 + __H2O
A
3C3H8O + O2 -> CO2 + H2O
B
3C3H8O + 92O2 -> 3CO2 + 4H2O
C
C3H8O + 92O2 -> 3CO2 + 4H2O
D
2C3H8O + 9O2 -> 6CO2 + 8H2O
E
None of the above are correct
Combustion Reactions
Decane is used as a solvent to make paper and rubber.
Pick the most complete answer that describes what happens when decane is combusted.
A
In the presence of excess oxygen, decane burns to form water and carboxide.
B
Chemical bonds are broken during the combustion reaction.
C
Decane reacts with oxygen to release heat, light, carbon dioxide, and water
D
The complete combustion of decane under sufficient supply of carbon gives carbon dioxide and water.
E
Chemical bonds are broken in the products while they are formed in the reactants.
Balancing Chemical Equations 2.
Nonanol is another hydrocarbon used in manufacturing.
Balance the following combustion reaction of Nonanol.
C9H22O + O2 -> CO2 + H2O
A
C9H22O + 14O2 -> 9CO2 + 11H2O
B
9C9H22O + 9O2 -> 9CO2 + 11H2O
C
C9H22O + 14O2 -> 9CO2 + 10H2O
D
1C9H22O + 9O2 -> 9CO2 + 10H2O
E
None of the above are correct
Conservation of Mass 2.
The below table shows the measured beginning and ending mass of most of the reactants and products from combusting 1 mole of Nonanol. Find the mass of the carbon dioxide gas created from this combustion reaction. Hint conservation of mass.
C9H22O
O2
CO2
H2O
146.27308g
447.9832g
198.16808g
A
396.0882g
B
594.25628g
C
301.71012g
D
249.81512g
E
None of the above are correct
Unit 5 Test.
Revised Version
Download and if possible print this test.
You will need a calculator, pen, and paper for this test.
Work out all the questions on this
sheet
first
. When you are complete
go to the assignment called Unit 5
Test Entry.
There you will use
the answers you came up with in this document to put into the Unit 5 Test Entry.
As always please read the questions carefully and use your notes, PowerPoints, the lab, and the k12
lessons.
Conservation of Mass 1.
C
3
H
8
O + O
2
-
> CO
2
+ H
2
O is
an unbalanced
reaction for the combustion of Isopropyl Alcohol.
The below table shows the measured beginning and ending mass of most of the reactants and products
from combusting 1 mole of isopropyl Alcohol.
Find the mass of the oxygen gas used
in this reaction.
Hint
conservation of mass.
C
3
H
8
O
O
2
CO
2
H
2
O
60.0952g
204.0954g
72.06112g
A
144.0002g
B
264.1906g
C
216.06132g
D
132.15632g
E
None of the above are correct
Balancing Chemical Equations 1.
Balance the remainder of this equation for the
combustion of 3C
3
H
8
O. Beware there is a google trap
hidden in this question.
3C
3
H
8
O +
__
O
2
-
>
__
CO
2
+
__
H
2
O
A
3C
3
H
8
O + O
2
-
> CO
2
+ H
2
O
B
3C
3
H
8
O + 92O
2
-
> 3CO
2
+ 4H
2
O
C
C
3
H
8
O + 92O
2
-
> 3CO
2
+ 4H
2
O
D
2
C
3
H
8
O +
9
O
2
-
>
6
CO
2
+
8
H
2
O
E
None of the
above are correct
Unit 5 Test.
Revised Version
Download and if possible print this test.
You will need a calculator, pen, and paper for this test.
Work out all the questions on this sheet first. When you are complete go to the assignment called Unit 5
Test Entry.
There you will use the answers you came up with in this document to put into the Unit 5 Test Entry.
As always please read the questions carefully and use your notes, PowerPoints, the lab, and the k12
lessons.
Conservation of Mass 1.
C
3
H
8
O + O
2
-> CO
2
+ H
2
O is an unbalanced reaction for the combustion of Isopropyl Alcohol.
The below table shows the measured beginning and ending mass of most of the reactants and products
from combusting 1 mole of isopropyl Alcohol. Find the mass of the oxygen gas used in this reaction. Hint
conservation of mass.
C
3
H
8
O O
2
CO
2
H
2
O
60.0952g 204.0954g 72.06112g
A 144.0002g
B 264.1906g
C 216.06132g
D 132.15632g
E None of the above are correct
Balancing Chemical Equations 1.
Balance the remainder of this equation for the combustion of 3C
3
H
8
O. Beware there is a google trap
hidden in this question.
3C
3
H
8
O + __O
2
-> __CO
2
+ __H
2
O
A 3C
3
H
8
O + O
2
-> CO
2
+ H
2
O
B 3C
3
H
8
O + 92O
2
-> 3CO
2
+ 4H
2
O
C C
3
H
8
O + 92O
2
-> 3CO
2
+ 4H
2
O
D 2C
3
H
8
O + 9O
2
-> 6CO
2
+ 8H
2
O
E None of the above are correct
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