AnswersLA-Chemistry AIntroduction to Stoichiometry

Introduction to Stoichiometry — Unit test Answers

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21
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One benefit of studying with other students is that they can

A
meet infrequently.
B
compare classes.
C
save time.
D
offer fresh perspectives.
22
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The balanced equation shows how sodium chloride reacts with silver nitrate to form sodium nitrate and silver chloride.NaCl + AgNO3 NaNO3 + AgCl If 4.00 g of NaCl react with 10.00 g of AgNO3, what is the excess reactant?

Question illustration
A
AgCl
B
NaCl
C
AgNO3
D
NaNO3
23

One of the best ways to practice good listening skills is to

A
judge what other members are saying.
B
only pay attention to what’s important.
C
let others talk without interrupting.
D
keep quiet during the entire session.
24

What is the relationship between a mole and Avogadro’s number?

A
A mole is the mass of Avogadro’s number of particles of a substance.
B
A mole is the amount of a compound that has Avogadro’s number of carbon-12 atoms in it.
C
A mole contains Avogadro’s number of particles of a substance.
D
A mole is the amount of any substance that has the same mass as Avogadro’s number of carbon-12 atoms.
25

What can members do to make a study group effective? Check all that apply.actively participate make their own rulesuse good listening skillsfollow group guidelineskeep ideas to themselves

A
actively participate
B
make their own rules
C
use good listening skills
D
follow group guidelines
E
keep ideas to themselves
26

Shiloh wanted to observe the changes that occurred during an exothermic reaction. He monitored the changes and placed them in a chart. Which statement best describes his data?

Question illustration
A
The activation energy was reached at 10:45 a.m. Without the additional energy, the reaction would have stopped.
B
The activation energy was reached at 11:15 a.m. The previous change was the threshold point for a reaction.
C
The activation energy was reached at 10:15 a.m. The additional energy allowed for a lower activity level.
D
The activation energy was reached was 10:45 a.m. The additional energy did not affect the reaction.
27

Working together and sharing the experience in a study group creates a(n)

A
multitasking opportunity.
B
sense of community.
C
time-saving way to study.
D
opportunity for independent study.
28

If a chemical reaction does not reach its activation energy, which will most likely occur?

A
The chemical bonds will remain unchanged.
B
The chemical bonds will break.
C
The chemical bonds will have high kinetic energy.
D
The chemical bonds will already be broken.
29

A successful study session starts off with members

A
reviewing information from the last meeting.
B
asking questions and discussing notes.
C
drilling one another on topics and concepts.
D
brainstorming potential test questions.
30

Consider the substances below.• 1 mol of beryllium• 1 mol of salt• 1 mol of water• 1 mol of hydrogenWhich statement is true about these substances?

A
They have exactly the same mass.
B
They have different numbers of particles.
C
They have the same number of atoms.
D
They have different masses.
31

Zamir’s study group has been given sample test questions to prepare for a exam. To start off a session, he asks other members, "Did you review the test questions?”

A
How do the test questions look to you?
B
Do you have your notes on the questions?
C
Do you know the answers to the questions?
D
Are the test questions easy or difficult?
33

An effective study group needs members who

A
always agree.
B
get good grades.
C
passively listen.
D
actively participate.
34

Ivan’s study group is preparing for a history test on World War II. His great-grandfather was a journalist during the war, so he shares some of his great-grandfather’s war stories with the group.

A
by relieving the boredom of reading a textbook
B
by letting Ivan do all the talking in the group
C
by offering a new perspective and more information
D
by making test questions easier and quicker to answer
35

Students working together to understand information is best described as

A
independent study.
B
home schooling.
C
collaborative learning.
D
secondary education.

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