Final Exam CHEM 219 Questions and Correct Answers | Latest Update
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Course
CHEM 219
Institution
CHEM 219
The speed of a wave (c) is the product of its frequency (ν) and wavelength (λ).
E = hv = h x c / λ
nm to m
or
m to nm
1 m / 10^9 nm
or
10^9 nm / 1 m
What is the maximum number of electrons that can have the quantum numbers n = 3, ℓ = 2, mℓ
= -2?
The Pauli exclusion prin...
Best Grades | Must Pass | Latest Update | Correct Answers | 2024/ 2025
Final Exam CHEM 219 Questions and
Correct Answers | Latest Update
The speed of a wave (c) is the product of its frequency (ν) and wavelength (λ).
E = hv = h x c / λ
nm to m
or
m to nm
1 m / 10^9 nm
or
10^9 nm / 1 m
What is the maximum number of electrons that can have the quantum numbers n = 3, ℓ = 2, mℓ
= -2?
The Pauli exclusion principle states that no two electrons in a given atom
can share the same set of four quantum numbers (n, ℓ, mℓ, ms). This set of
quantum numbers contains three quantum numbers, with the only missing
quantum number being ms, which can take on the values +½ and -½.
Therefore, this set of three quantum numbers represents a single atomic
orbital, which can contain two unique electrons: one with ms = +½ and one
with ms = -½.
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An exothermic reaction causes the surroundings to
An exothermic reaction transfers energy from the system to the
surroundings. That tells us the surroundings will get warmer.
A theory is another word for a(n) _________.
A theory or model is a well established explanation of a phenomenon
based on a series of facts and a body of evidence.
What is the definition of a natural law?
A scientific law summarizes an observable behavior.
The skeletal structure of a complex organic molecule is shown below. Determine the number of
sigma (σ) and pi (π) bonds in the molecule.
Remember a single bond = 1 σ; a double bond = 1 σ + 1 π; a triple
bond = 1 σ + 2 π. This molecule contains 6 double bonds, so there are 6σ
and 6π. There are 28 single bonds, so there are 28 σ. This is a total 34σ
and 6π.
strontium phosphate
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Sr₃(PO₄)₂
Which of the following statements is true?
One driving force in the vaporization of a liquid is an incre ase in disorder
(entropy). Gas molecules are more disordered than liquid molecules.
Adding a non-volatile solute to a liquid also increases the disorder of the
liquid molecules, so the difference in disorder between the liquid and gas
phases is not as great as with a pure substance. Therefore the tendency to
vaporize is not as great for the solution as it is for the pure liquid,
resulting in a lower vapor pressure for the solution.
Which of the following aqueous solutions would have the highest boiling point?
A) 1.0 m NaNO3
B) 1.0 m HF
C) 1.0 m C₆H₁₂O₆
D) 1.0 m CaCl2
The dissolved solute will raise the boiling point. The more "things" that are
dissolved (ions or molecules), the higher the boiling point will be. The
CaCl₂ will break up into one Ca²⁺ ion and two Cl⁻ ions and there will be a
concentration of 3.0 m of "things" in solution. The other choices will have
fewer "things" in solution and will raise the boiling point less.
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