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Final Exam CHEM 219 Questions with Correct Solutions.
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Final Exam CHEM 219 Questions with Correct Solutions.
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Final Exam CHEM 219Questions with Correct
Solutions
Denning [Date] [Course title]
, The speed of a wave (c) is the product of its frequency (ν) and wavelength (λ). - Correct Answers: E = hv
=hxc/λ
nm to m
or
m to nm - Correct Answers: 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? -
Correct Answers: 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 - Correct Answers: 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) _________. - Correct Answers: 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? - Correct Answers: 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. - Correct Answers: 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 - Correct Answers: Sr₃(PO₄)₂
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