AnswersFL-2003350-Chemistry 1 HonorsUnit Test

Unit Test — Cumulative exam Answers

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1
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In the human body, a series of chemical reactions results in the making of energy that is used at both the cellular and organismal levels. In which course would a person most likely study these chemical reactions?

A
biochemistry
B
geochemistry
C
materials chemistry
D
physical chemistry
2
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Which is a set of valid quantum numbers?

A
n = 4, l = 4, m = 4
B
n = 1, l = –2, m = 0
C
n = –1, l = 0, m = 0
D
n = 4, l = 3, m = 3
3

What was Johann Dobereiner’s contribution to the development of the periodic table?

A
He arranged the elements according to increasing atomic mass.
B
He arranged the elements according to increasing atomic number.
C
He identified triads of elements that had similar properties.
D
He organized elements into four groups based on their properties.
4

What is the volume of 0.200 mol of an ideal gas at 200. kPa and 400. K?Use and .

Question illustration
A
0.83 L
B
3.33 L
C
5.60 L
D
20.8 L
5

How many electrons can the n = 4 shell hold?

A
8
B
16
C
32
D
64
6

Scientists recently identified the function of three proteins in plants. The proteins regulate the production of fatty acids, which are found in fats and oils. Which question will most likely be asked about the results, leading to more investigations?

A
How are proteins produced?
B
Are the plants nonrenewable resources?
C
How much energy do fatty acids produce when they are burned as fuel?
D
How can the proteins be used to increase the amount of oil produced by a plant?
7

Scientists who rely on creativity also tend to be persistent when they pursue a research goal. How might persistence be an advantage for a creative scientist?

A
The scientist does not mind repeating experiments multiple times after each failed attempt.
B
The scientist is capable of working long hours in the lab to solve problems.
C
The scientist is able to spend long periods of time focused on a single research topic.
D
The scientist is more likely to keep trying new ideas if the first idea does not work.
8

A scientist investigated the effects of morning temperatures on flower width. Which most likely could have been a source of error in his investigation?

A
The distance calipers were recalibrated before each data collection session.
B
The control group flowers were a day older than the experimental group flowers.
C
The measurement units were not converted during the data analysis phase.
D
The flower width data were collected at about the same time every day.
9

Which compound most likely contains polar covalent bonds?

A
NaCl
B
AlF3
C
Br2
D
NF3
10

Which will most likely lead to new scientific discoveries in future years?

A
current scientific knowledge
B
current science fiction movies
C
reduction of the elementary school science curriculum
D
rejection of all new scientific ideas
11

What is the chemical formula for copper(II) sulfate?

A
CuSO
Option A
B
CuSO
Option B
C
CuS
D
CuS
Option D
12

The diagram below shows the different phase transitions that occur in matter.Which best describes the process that arrow 1 represents?

Question illustration
A
Molecules are speeding up during boiling.
B
Molecules are depositing as ice on a surface.
C
Molecules are slowing down during condensing.
D
Molecules are moving from stationary positions.
13

Which trait would most likely lead a scientist to investigate a blood-thinning agent in the saliva of vampire bats?

A
creativity
B
curiosity
C
diversity
D
skepticism
14

The graph below shows changes in Earth’s average surface temperature since 1880.The general trend that is shown on the graph is that average surface temperature on Earth

Question illustration
A
has fallen by 0.4°C since 1880.
B
has risen by nearly 1°C since 1880.
C
dropped a fraction of a degree in 2000.
D
rose sharply between the years 1900 and 1920.
15

After observing a moth that is camouflaged against dark-colored bark, a scientist asks a question. The scientist discovers that the question has already been asked and answered by several investigations. What should the scientist do?

A
The scientist should test the question anyway.
B
The scientist should broaden the scope of the question.
C
The scientist should come up with a new way to test the question.
D
The scientist should revise the question to address a gap in knowledge.
16

Anita is comparing the accepted value for a physical property to the value she measured in the laboratory. Which characteristic of her measured value is Anita most likely trying to evaluate?

A
accuracy
B
mean
C
precision
D
range
17

In what way do investigations build scientific knowledge?

A
The results of investigations lead to questions that cannot be tested.
B
They reflect the opinions and social values of scientists, ensuring valid information.
C
The results of investigations lead to new questions, which lead to new investigations.
D
They are not influenced by the research of earlier scientists, so they are able to address gaps in understanding.
18

Quarks are thought to be the building blocks of protons. Which was most affected by the discovery of the quark?

A
the estimated mass of a proton
B
the observation that protons have a +1 charge
C
the view that the atom cannot be broken down further than protons
D
the theory that the nucleus of an atom contains protons and neutrons
19

What information in the MSDS would be most important to know at the end of an experiment?

A
the boiling point
B
the flammability
C
the disposal procedure
D
the reactivity
20

A piece of sodium metal can be described as

A
a pure substance and a compound.
B
an impure substance that is reactive.
C
an impure substance that is unreactive.
D
a pure substance and an element.

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