Final Exam CHEM 219 2026
Exam Questions and Answers |
A+ Score Assured
The speed of a wave (c) is the product of its frequency (ν) and wavelength
(λ). - 🧠 ANSWER ✔✔E = hv = h x c / λ
nm to m
or
m to nm - 🧠 ANSWER ✔✔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? - 🧠 ANSWER ✔✔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.
An exothermic reaction causes the surroundings to - 🧠 ANSWER ✔✔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) _________. - 🧠 ANSWER ✔✔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? - 🧠 ANSWER ✔✔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. - 🧠
ANSWER ✔✔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 - 🧠 ANSWER ✔✔Sr₃(PO₄)₂
Which of the following statements is true? - 🧠 ANSWER ✔✔One driving
force in the vaporization of a liquid is an increase 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?
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
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Exam Questions and Answers |
A+ Score Assured
The speed of a wave (c) is the product of its frequency (ν) and wavelength
(λ). - 🧠 ANSWER ✔✔E = hv = h x c / λ
nm to m
or
m to nm - 🧠 ANSWER ✔✔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? - 🧠 ANSWER ✔✔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.
An exothermic reaction causes the surroundings to - 🧠 ANSWER ✔✔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) _________. - 🧠 ANSWER ✔✔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? - 🧠 ANSWER ✔✔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. - 🧠
ANSWER ✔✔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 - 🧠 ANSWER ✔✔Sr₃(PO₄)₂
Which of the following statements is true? - 🧠 ANSWER ✔✔One driving
force in the vaporization of a liquid is an increase 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?
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
