AnswersS1S Chemistry B E4912 - AGNuclear Energy

Nuclear Energy — Cumulative exam Answers

16 verified answers
21
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Which best describes the functional group in an aldehyde?

A
a carbonyl group inserted into the main chain
B
an –OH group and a carbonyl group attached to the main chain
C
a carbon chain with a carbonyl group bonded to one end
D
a carboxylic acid bonded on each side to a carbon chain
22
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Look at the diagram of a fuel cell below.Which part of the fuel cell does A represent?

Question illustration
A
air
B
anode
C
cathode
D
electrolyte
23

The expression below was formed by combining different gas laws. Which law was used to determine the relationship between the volume and the number of moles in this equation?

Question illustration
A
Boyle’s law
B
Charles’s law
C
Avogadro’s law
D
Gay-Lussac’s law
24

The diagram below shows the energy conversions of the Krebs cycle, which is part of cellular respiration. The U-shaped arrows that show changes for NAD+, FAD, and ADP molecules represent energy conversions. From each glucose molecule, two acetyl-CoA molecules are made for the Krebs cycle.How many energy conversions occur when both acetyl-CoA molecules go through the Krebs cycle?

Question illustration
A
5
B
6
C
10
D
12
25

A mixture of three noble gases has a total pressure of 1.25 atm. The individual pressures exerted by neon and argon are 0.68 atm and 0.35 atm, respectively. What is the partial pressure of the third gas, helium?Use .

Question illustration
A
0.22 atm
B
0.33 atm
C
1.03 atm
D
2.28 atm
26

A 60.0-g sample of fermium-253 was placed in a sealed vessel 9.0 days ago. Only 7.5 g of this isotope is now left. What is the half-life of fermium-253?

A
3.0 days
B
4.5 days
C
17.5 days
D
20.0 days
27

The pOH of a solution is 6.0. Which statement is correct?Use and .

Question illustration
A
The pH of the solution is 20.0.
B
The concentration of OH– ions is .
Option B
C
The concentration of OH– ions is .
Option C
D
The pH of the solution is 8.0.
28

NaCl has a Hfus = 30.2 kJ/mol and a Hvap = 171 kJ/mol. What mass of NaCl releases 452 kJ of heat as it changes into a liquid?Use .

Question illustration
A
2.64 g
B
22.1 g
C
155 g
D
875 g
29

Molecules in all organisms are composed in part of radioactive carbon-14. Which statement best explains the presence of carbon-14 in organisms?

A
The radioactive isotope reacts in the same way as stable isotopes in the nuclear reactions in the body.
B
The radioactive isotope reacts in the same way as stable isotopes in the chemical reactions in the body.
C
The radioactive isotope reacts faster than stable isotopes in the nuclear reactions in the body.
D
The radioactive isotope reacts faster than stable isotopes in the chemical reactions in the body.
30

Katie wants to make ball-and-stick models of the four macromolecules. She has colored balls for each of the elements in these molecules, including the following. red: hydrogen black: carbon purple: oxygen green: nitrogenIn which macromolecule will she use the black, red, and purple balls in a ratio of 1:2:1?

A
carbohydrates
B
lipids
C
nucleic acids
D
proteins
31

Which is a characteristic of nuclear fission?

A
releases nonradioactive waste only
B
involves the collision of two nuclei
C
releases small amounts of energy compared to fossil fuels
D
involves the splitting of an atom into two or more fragments
32

A chemistry journal requires that all new research papers be peer reviewed by other scientists before they are published. This allows which of the following?

A
The reviewers can determine the experiment’s feasibility.
B
The reviewers can determine the experiment’s validity.
C
The reviewers can include their own findings with the research.
D
The reviewers can determine if they will help fund the research.
33

Water is dissolved into n-butanol (a polar liquid). Which is the second step at the molecular level as water dissolves into n-butanol?

A
n-Butanol mixes with water.
B
Water molecules are carried into n-butanol.
C
n-Butanol molecules surround water molecules.
D
n-Butanol molecules are attracted to the surface of the water molecules.
34

The molar mass of NaOH is 40.00 g/mol. If 5.20 g NaOH are dissolved in 0.500 L of solution, what is the molarity of the solution?Use .

Question illustration
A
0.0125 M
B
0.260 M
C
3.85 M
D
7.69 M
35

A beam of light passes though a liquid in a test tube without scattering. Which type of mixture is most likely in the test tube?

A
colloid
B
emulsion
C
solution
D
suspension
36

What is a common use of bases?

A
as a component of vinegar
B
as a component of car batteries
C
to make foods tart
D
to reduce indigestion
37

Consider the hydrocarbon below.What is the name of this hydrocarbon?

Question illustration
A
1-ethyne
B
1-pentyne
C
1-ethane
D
1-butyne
38

Ca(OH)2 is added to a large beaker of water. How is the solution different from the original water?

A
The solution turns blue litmus to red.
B
The solution turns phenolphthalein pink.
C
The solution has more hydrogen ions.
D
The solution has fewer hydroxide ions.
39

Ethylene, a gas found in nature, is commonly used to ripen bananas and other fruits. Which compound is ethylene?

A
2 C H 2 are single bonded to each other, and both are single bonded to the same O.
Option A
B
A skeletal model with a chain beginning with O H, then line segments going up, down, up and ending at another O H.
Option B
C
2 carbons are double-bonded to each other; the pair are single bonded to H above left, above right, below right, and below left.
Option C
D
Two carbons are triple bonded to each other; each is single bonded to H to the outside.
Option D
40

What is the name of the organic compound below?

Question illustration
A
1-chloro alcohol
B
4-chloro, 2-butanol
C
1-chloro butanol
D
1-chloro butanoic acid

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