Examination
180 minutes
Instructions:
1. Read each question carefully.
2. Answer all questions.
3. Use the provided answer sheet to mark your responses.
4. Ensure all answers are final before submitting the exam.
5. Please answer each question below and click Submit when you
have completed the Exam.
6. This test has a time limit, The test will save and submit
automatically when the time expires
7. This is Exam which will assess your knowledge on the course
Learning Resources.
Good Luck!
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Read All Instructions Carefully and Answer All the
Questions Correctly Good Luck: -
What is the term used for findings that are summarized
based on a pattern or trend?
a. Law
b. Hypothesis
c. Theory
d. Phenomena
e. Prediction - Answer>> a. Law
What is the percent sulfur in iron(III) sulfate?
Select one:
a. 28%
b. 32%
c. 24%
d. 48%
e. 42% - Answer>> c. 24%
Proteins found in humans are polymers that consist of
different combinations of 20 amino acids. Proline, one
of the 20 amino acids, has the molecular formula,
C5H9NO2. If a human protein has 25 proline
monomers, how many carbon atoms from proline are
present in the protein?
Select one:
a. 4 C atoms
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, b. 25 C atoms
c. 40 C atoms
d. 100 C atoms
e. 125 C atoms - Answer>> e. 125 C atoms
Aluminum oxide, Al2O3, is used as a filler for paints and
varnishes as well as in the manufacture of electrical
insulators. Calculate the number of moles in 47.51 g of
Al2O3.
Select one:
a. 2.377 mol
b. 2.146 mol
c. 1.105 mol
d. 0.4660 mol
e. 0.4207 mol - Answer>> d. 0.4660 mol
If 119.3 g of PCl5 are formed from the reaction of 61.3
g Cl2 with excess PCl3, what is the percent yield?
PCl3(g) + Cl2(g) → PCl5(g)
Select one:
a. 94.6%
b. 66.3%
c. 57.3%
d. 51.3%
e. 48.6% - Answer>> b. 66.3%
What mass of ammonia is formed when 5.36 g of
nitrogen gas reacts with excess hydrogen gas?
Select one:
a. 3.26 g
b. 0.629 g
c. 13.04 g
d. 17.63 g
e. 6.52 g - Answer>> e. 6.52 g
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