Cem 141 Final MSU Exam Questions
with Solutions
Air and smoke - -Which of the following contains atoms? Air, Light, Smoke,
Heat
- Cathodes made of multiple different metals emit electrons. - -Dalton's
atomic theory proposed that atoms are indivisible. Which piece of evidence
forced a revision of this model of the atom?
- Scientific Theory - -What is this an example of? The molecular level
properties of substances determine their macroscopic properties?
- The lack of charge and because it cannot be manipulated my electric and
magnetic fields. - -What property of the neutron is attributed to the long
delay in it's discovery? and why?
- CO2 is a compound and CO2 is an element - -For the balanced chemical
reaction CO2 -> C+O2, what is true?
- True - -True or false; A molecule must have at least two atoms
- True - -True or false; The molar mass of an atom must be smaller than the
molar mass of a molecule
- True - -A gravitational force is exerted between the moon and the earth. Is
this statement about their force true or false? The force would increase if the
mass of the Moon increased
- Hydrogen molecules have a larger instantaneous dipole moment compared
to helium atoms - -The boiling point of molecular hydrogen is higher than
the boiling point of helium because...
- When a ball os flying down toward the earth and two positively charged
objects move apart - -When does potential energy of a system decrease?
- True - -Is it true or false that potential energy is at a minimum at the Van
der Waals radius?
- Substances containing covalent bonds have higher boiling points than
substances that do not contain covalent bonds. - -What would be the claim
from this evidence? "The boiling point of N2 is 77K while the boiling point of
Ne is 27k"
, - The covalent bonds in N2 are stronger than the LDFs in Ne and require
more energy to break when it boils. - -What would be the reasoning from
this claim and evidence? "Substances containing covalent bonds have higher
boiling points than substances that do not contain covalent bonds. The
boiling point of N2 is 77K while the boiling point of Ne is 27k"
- Formed causing energy to be absorbed by the system - -When liquid Xe is
cooled to 161K, it freezes. During the freezing process, LDFs are...
- repulsive; increases; increase - -As two He atoms approach and get close
enough that their electron clouds overlap, the _________ electrostatic force
______, causing the potential energy to _________.
- Because both the alpha particle and the nucleus are positively charged and
so the alpha particle is repelled. - -In Rutherford's experiment, why are
alpha particles deflected by the nucleus?
- False because the atoms of the same element can have different numbers
of protons. - -Is this statement from Dalton's Atomic Theory true or false,
and why? "All atoms of an element are identical and have the same mass
and properties."
- Electrons are waves; the electrons interfere constructively and
destructively - -When electrons pass through a sheet of aluminum, they
show a pattern of high and low intensity. This experimental result provides
evidence that ____________ because __________
- A photon of yellow light - -An absorption spectrum for a certain element
has a black band in the yellow region of the visible light spectrum. The black
band corresponds to...
- Light having properties of a particle; electrons were emitted off metal
surfaces when the frequency of light exceeded a certain threshold - -The
photoelectric effect provided evidence of ________ through the observation
that _________
- 7.5 x 10^17 Hz - -The wavelength of electromagnetic radiation is 0.40 nm.
What us the frequency of the radiation?
- N3-; The electrostatic force between the electrons is stronger - -__________
Has the largest atomic radius because....
- The galaxy of interest has oxygen and the galaxy if interest is moving
away from us - -An absorption spectrum was collected of a galaxy far away
from earth and the characteristic pattern of hydrogen absorption was
with Solutions
Air and smoke - -Which of the following contains atoms? Air, Light, Smoke,
Heat
- Cathodes made of multiple different metals emit electrons. - -Dalton's
atomic theory proposed that atoms are indivisible. Which piece of evidence
forced a revision of this model of the atom?
- Scientific Theory - -What is this an example of? The molecular level
properties of substances determine their macroscopic properties?
- The lack of charge and because it cannot be manipulated my electric and
magnetic fields. - -What property of the neutron is attributed to the long
delay in it's discovery? and why?
- CO2 is a compound and CO2 is an element - -For the balanced chemical
reaction CO2 -> C+O2, what is true?
- True - -True or false; A molecule must have at least two atoms
- True - -True or false; The molar mass of an atom must be smaller than the
molar mass of a molecule
- True - -A gravitational force is exerted between the moon and the earth. Is
this statement about their force true or false? The force would increase if the
mass of the Moon increased
- Hydrogen molecules have a larger instantaneous dipole moment compared
to helium atoms - -The boiling point of molecular hydrogen is higher than
the boiling point of helium because...
- When a ball os flying down toward the earth and two positively charged
objects move apart - -When does potential energy of a system decrease?
- True - -Is it true or false that potential energy is at a minimum at the Van
der Waals radius?
- Substances containing covalent bonds have higher boiling points than
substances that do not contain covalent bonds. - -What would be the claim
from this evidence? "The boiling point of N2 is 77K while the boiling point of
Ne is 27k"
, - The covalent bonds in N2 are stronger than the LDFs in Ne and require
more energy to break when it boils. - -What would be the reasoning from
this claim and evidence? "Substances containing covalent bonds have higher
boiling points than substances that do not contain covalent bonds. The
boiling point of N2 is 77K while the boiling point of Ne is 27k"
- Formed causing energy to be absorbed by the system - -When liquid Xe is
cooled to 161K, it freezes. During the freezing process, LDFs are...
- repulsive; increases; increase - -As two He atoms approach and get close
enough that their electron clouds overlap, the _________ electrostatic force
______, causing the potential energy to _________.
- Because both the alpha particle and the nucleus are positively charged and
so the alpha particle is repelled. - -In Rutherford's experiment, why are
alpha particles deflected by the nucleus?
- False because the atoms of the same element can have different numbers
of protons. - -Is this statement from Dalton's Atomic Theory true or false,
and why? "All atoms of an element are identical and have the same mass
and properties."
- Electrons are waves; the electrons interfere constructively and
destructively - -When electrons pass through a sheet of aluminum, they
show a pattern of high and low intensity. This experimental result provides
evidence that ____________ because __________
- A photon of yellow light - -An absorption spectrum for a certain element
has a black band in the yellow region of the visible light spectrum. The black
band corresponds to...
- Light having properties of a particle; electrons were emitted off metal
surfaces when the frequency of light exceeded a certain threshold - -The
photoelectric effect provided evidence of ________ through the observation
that _________
- 7.5 x 10^17 Hz - -The wavelength of electromagnetic radiation is 0.40 nm.
What us the frequency of the radiation?
- N3-; The electrostatic force between the electrons is stronger - -__________
Has the largest atomic radius because....
- The galaxy of interest has oxygen and the galaxy if interest is moving
away from us - -An absorption spectrum was collected of a galaxy far away
from earth and the characteristic pattern of hydrogen absorption was
