Chem 103 Exam 2 Questions and Answers
Updates 100% Correct Latest Version
Due No due date Points 100 Questions 10 Time Limit 120
Minutes Requires Respondus LockDown Browser
Instructions
Please read the following before beginning the exam:
You must show your work for calculations or give an explanation for short answer questions
in order to receive credit.
You may only use the methods and explanations provided by this course for your answers.
The use of a method or explanation that was not taught in this course is a violation of the
Academic Integrity Policy.
You MUST only use the Periodic Table provided within the exam.
You MUST only use the equation bank that is provided within the exam.
The use of printed versions of the Periodic Table and equation bank will be considered a violation
of the Academic Integrity Policy.
Any equation or constant used on an exam that is not from the equation bank and is different
from the method taught in this course will be considered an outside source and a violation of the
Academic Integrity Policy.
During module exams you may not use any outside source of information such as
the module, problem sets, notes, Internet, tutor, etc.
You may ONLY copy and paste from within the exam itself, from the equation bank, or
from the provided calculator but not from an outside source.
The only items you should have in front of you are your computer, 1-2 pieces of blank scratch
paper, a calculator (non-cell phone), and a pen/pencil.
1/18
,Attempt History
Attempt Time Score
LATEST 112 minutes 100 out of 100
Score for this quiz: 100 out of
100 Submitted May 20 at
11am pts
Question 1
This attempt took 112 minutes.
You may find the following resources helpful:
Scientific Calculator (https://
Periodic Table
(https://previous.nursingabc.com/upload/images/Help_file_picture/Periodic_
Equation Table
(https://portagelearning.instructure.com/courses/948/files/271474/download?
download_frd=1)
Show the calculation of the molecular weight for the following
compounds, reporting your answer to 2 places after the decimal.
1.Al2(SO4)3
2.C7H5NOBr
Your Answer:
1.Al2(SO4)3
Al = 2 x 26.98 = 53.96
S = 3 x 32.07 = 96.21
O = 12 x 16.00 = 192
2/18
, Total Molecular Weight for Al2(SO4)3 = 342.17
2.C7H5NOBr
C = 7 x 12.01 = 84.07
H = 5 x 1.008 = 5.04
N = 1 x 14.01 = 14.01
O = 1 x 16.00 = 16.00
Br = 1 x 79.90 = 79.90
Total Molecule Weight for C7H5NOBr= 199.02
1.2Al + 3S + 12O = 342.17
2.7C + 5H + N + O + Br = 199.02
pts
Question 2
You may find the following resources helpful:
Scientific Calculator (https://
Periodic Table
(https://previous.nursingabc.com/upload/images/Help_file_picture/Periodic_
Equation Table (https://portagelearning.instructure.com/courses/948/files/271474/download? down
3/18
, Show the calculation of the number of moles in the given amount of the
4/18
Updates 100% Correct Latest Version
Due No due date Points 100 Questions 10 Time Limit 120
Minutes Requires Respondus LockDown Browser
Instructions
Please read the following before beginning the exam:
You must show your work for calculations or give an explanation for short answer questions
in order to receive credit.
You may only use the methods and explanations provided by this course for your answers.
The use of a method or explanation that was not taught in this course is a violation of the
Academic Integrity Policy.
You MUST only use the Periodic Table provided within the exam.
You MUST only use the equation bank that is provided within the exam.
The use of printed versions of the Periodic Table and equation bank will be considered a violation
of the Academic Integrity Policy.
Any equation or constant used on an exam that is not from the equation bank and is different
from the method taught in this course will be considered an outside source and a violation of the
Academic Integrity Policy.
During module exams you may not use any outside source of information such as
the module, problem sets, notes, Internet, tutor, etc.
You may ONLY copy and paste from within the exam itself, from the equation bank, or
from the provided calculator but not from an outside source.
The only items you should have in front of you are your computer, 1-2 pieces of blank scratch
paper, a calculator (non-cell phone), and a pen/pencil.
1/18
,Attempt History
Attempt Time Score
LATEST 112 minutes 100 out of 100
Score for this quiz: 100 out of
100 Submitted May 20 at
11am pts
Question 1
This attempt took 112 minutes.
You may find the following resources helpful:
Scientific Calculator (https://
Periodic Table
(https://previous.nursingabc.com/upload/images/Help_file_picture/Periodic_
Equation Table
(https://portagelearning.instructure.com/courses/948/files/271474/download?
download_frd=1)
Show the calculation of the molecular weight for the following
compounds, reporting your answer to 2 places after the decimal.
1.Al2(SO4)3
2.C7H5NOBr
Your Answer:
1.Al2(SO4)3
Al = 2 x 26.98 = 53.96
S = 3 x 32.07 = 96.21
O = 12 x 16.00 = 192
2/18
, Total Molecular Weight for Al2(SO4)3 = 342.17
2.C7H5NOBr
C = 7 x 12.01 = 84.07
H = 5 x 1.008 = 5.04
N = 1 x 14.01 = 14.01
O = 1 x 16.00 = 16.00
Br = 1 x 79.90 = 79.90
Total Molecule Weight for C7H5NOBr= 199.02
1.2Al + 3S + 12O = 342.17
2.7C + 5H + N + O + Br = 199.02
pts
Question 2
You may find the following resources helpful:
Scientific Calculator (https://
Periodic Table
(https://previous.nursingabc.com/upload/images/Help_file_picture/Periodic_
Equation Table (https://portagelearning.instructure.com/courses/948/files/271474/download? down
3/18
, Show the calculation of the number of moles in the given amount of the
4/18
