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MSU CEM 141 Final Exam Prep Newest Actual Exam
With Complete Questions And Correct Detailed
Answers ||Verified Exam!!! (Verified Answers) |Already
Graded A+||Newest Exam!!!
Why does the potential energy increase as two xenon
atoms move extremely close together?
a. Because the kinetic energy decreases as the atoms
slow down.
b. Because the electrostatic attractive force, from the
instantaneous dipoles, is dominant.
c. Because the repulsive force, between the overlapping
electron clouds, is dominant.
d. Because there is more potential energy than kinetic
energy when the atoms are close together. - Answers-c.
because the repulsive force, between the overlapping
electron clouds, is dominant
Which statement best describes the forces that exist
between helium atoms in the solid state?
a. The electron cloud on one helium atom is attracted to
the electron cloud on the other atom.
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b. The nucleus of one helium atom is repelled by the
nucleus of the neighboring atom.
c. The helium atoms share electrons, forming a bond.
d. The partial positive end of one atom's instantaneous
dipole attracts the partial negative end of the neighboring
atom's induced dipole.
e. Both atoms have mass, so they are attracted to each
other by gravitational forces. - Answers-d. The partial
positive end of one atom's instantaneous dipole attracts
the partial negative end of the neighboring atom's induced
dipole.
When a covalent bond is formed between two nitrogen
atoms:
I. Energy is absorbed
II. Energy is released
III. A molecule is formed
IV. The nitrogen changes from the gaseous to liquid state.
- Answers-II and III: energy is released and a molecule is
formed
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The London dispersion force between two neon atoms
compared to the London dispersion force between two
argon atoms where both systems are the most stable is:
I. the same
II. stronger
III. weaker
Because:
IV. They are both noble gases.
V. Neon has a smaller electron cloud, therefore there will
be a smaller separation of charge resulting in a weaker
force.
VI. Neon has a smaller electron cloud, therefore there will
be a larger separation of charge resulting in a stronger
force. - Answers-III and V: weaker, because neon has a
smaller electron cloud, therefore there will be a smaller
separation of charge resulting in a weaker force
Is the following statement true or false?
When chlorine freezes, London dispersion forces are
formed.
MSU CEM 141 Final Exam Prep Newest Actual Exam
With Complete Questions And Correct Detailed
Answers ||Verified Exam!!! (Verified Answers) |Already
Graded A+||Newest Exam!!!
Why does the potential energy increase as two xenon
atoms move extremely close together?
a. Because the kinetic energy decreases as the atoms
slow down.
b. Because the electrostatic attractive force, from the
instantaneous dipoles, is dominant.
c. Because the repulsive force, between the overlapping
electron clouds, is dominant.
d. Because there is more potential energy than kinetic
energy when the atoms are close together. - Answers-c.
because the repulsive force, between the overlapping
electron clouds, is dominant
Which statement best describes the forces that exist
between helium atoms in the solid state?
a. The electron cloud on one helium atom is attracted to
the electron cloud on the other atom.
,2|Page
b. The nucleus of one helium atom is repelled by the
nucleus of the neighboring atom.
c. The helium atoms share electrons, forming a bond.
d. The partial positive end of one atom's instantaneous
dipole attracts the partial negative end of the neighboring
atom's induced dipole.
e. Both atoms have mass, so they are attracted to each
other by gravitational forces. - Answers-d. The partial
positive end of one atom's instantaneous dipole attracts
the partial negative end of the neighboring atom's induced
dipole.
When a covalent bond is formed between two nitrogen
atoms:
I. Energy is absorbed
II. Energy is released
III. A molecule is formed
IV. The nitrogen changes from the gaseous to liquid state.
- Answers-II and III: energy is released and a molecule is
formed
, 3|Page
The London dispersion force between two neon atoms
compared to the London dispersion force between two
argon atoms where both systems are the most stable is:
I. the same
II. stronger
III. weaker
Because:
IV. They are both noble gases.
V. Neon has a smaller electron cloud, therefore there will
be a smaller separation of charge resulting in a weaker
force.
VI. Neon has a smaller electron cloud, therefore there will
be a larger separation of charge resulting in a stronger
force. - Answers-III and V: weaker, because neon has a
smaller electron cloud, therefore there will be a smaller
separation of charge resulting in a weaker force
Is the following statement true or false?
When chlorine freezes, London dispersion forces are
formed.
