Exam (elaborations)
Chemistry 1010 Final Questions and Answers 2024
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Chemistry 1010 Final
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Chemistry 1010 FinalRenewable energy sources include: - answer- hydroelectric power
- geothermal power
- solar power
In the U.S. the primary energy source used to generate electricity is: - answer
combustion of fossil fuels
Einstein's equation E = mc2 means that matter can be converted into: - answer energy
Which of the following options correctly describe the process of nuclear fission? Select
all that apply. - answer- Energy is released during nuclear fission.
- During nuclear fission, a large nucleus splits into smaller ones.
During nuclear fission, the mass of the products is slightly _____ than the mass of the
reactants. This mass difference accounts for the energy _____ by the reaction. - answer
lower, released
Renewable energy sources are: - answercontinually and rapidly replenished from
natural sources
T/F:Most of the electricity generated in the U.S. is produced from nuclear power. -
answerFalse
Which of the following options correctly interpret and explain the equation E = mc2?
Select all that apply. - answer- This equation shows that matter can be converted into
energy
- This equation can be used to explain how a nuclear reaction produces energy.
- The symbol c in this equation represents the speed of light.
The process during which a large nucleus is split into smaller ones is called nuclear
_____. - answerfission
How does the process of nuclear fission produce energy? - answerMass of the
reactants is converted into energy, which is released.
Which of the following factors determine whether or not a nucleus will undergo nuclear
fission? Select all that apply. - answer- the size of the nucleus
- The number of protons in the nucleus
How many protons and neutrons are found in chlorine-37? - answer17 protons; 20
neutrons
, Which of the following options correctly interpret the symbol Rn224/86? Select all that
apply. - answer- The number 86 is the atomic number of the isotope.
- 86 represents the number of protons in the nucleus.
-Rn is the symbol of the element.
True or false: A nuclear equation is balanced in the same way as any other chemical
equation. - answerfalse
- reason: In a chemical equation the atoms must balance. In a nuclear equation the
atoms do not balance, since one nucleus is converted into another. Instead, the protons
and neutrons will balance.
Match each letter in the following nuclear equation with the correct value or symbol in
each case.
U92235 + n01 → A38x + By140 + 2n01 - answer- x -> 94
- y -> 54
- A -> Sr
- B -> Xe
Which of the following options correctly describe the factors that influence the ability of a
nucleus to undergo fission? Select all that apply. - answer- Small nuclei are less likely to
undergo fission.
- The number of protons and neutrons influence the ability of a nucleus to undergo
fission.
- Heavy nuclei may undergo fission if bombarded with high-energy neutrons.
Only the neutrons that are produced should be shown in a nuclear fission equation
because it is assumed that _____ initiates the nuclear reaction. - answer1
How many neutrons are in the carbon-11 isotope? - answer5
Which of the following options correctly describe a chain reaction? Select all that apply.
- answer- A chain reaction is one that becomes self-sustaining.
- In a chain reaction, one of the reaction products is recycled as a reactant.
The symbol Pu94244 represents a isotope of plutonium. Match each part of the symbol
with its correct meaning. - answer- 94 represents the: Atomic Number
- 244 represents the: Mass Number
- there are 94: Protons in the nucleus
- there are 244: Protons + neutrons in the nucleus
The amount of fissionable nuclear fuel required to sustain a nuclear chain reaction is
called a _____ mass. - answercritical
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