CHEM 219 Study guides, Class notes & Summaries

Chem 219: Module 2 Exam Questions With 100% Correct Answers What are hydrocarbons? - answerMolecules composed of only the elements carbon and hydrogen What are the two major classes of hydrocarbons? - answerAromatic (benzene) and aliphatic (alkanes, alkenes, alkynes) What is the main source of hydrocarbons? - answerFossil fuels like coal, petroleum, and natural gas obtained by mining and drilling. What are Alkanes? - answerThey are saturated hydrocarbons because their skeleton is only c...

Chem&219 Unit 2 NAMING Exam Questions With 100% Correct Answers 2024 What does the prefix and suffix of the alkanes indicate? - answerThe prefix of the name (meth-, eth-, prop-, but-) describes the number of carbon atoms present, while the suffix - ane, denotes a saturated hydrocarbon. nomenclature - answerThe "naming" of a molecular structure, that is more systematic than simply basing the name on the number of carbon atoms present. International Union of Pure and Applied Chemistry (IUPA...

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 num...

On a piece of scratch paper, write out the Lewis Dot Diagram for each of the indicated elements and determine the following for each: a) The number of Lone Pairs the atom possesses in its valence shell. b) The number of Unpaired Electrons the atom possesses in its valence shell. c) The number of bonds the atom will form. Oxygen Carbon Hydrogen Nitrogen - Answer-Oxygen - a) 2 b) 2 c) 2 Carbon - a) 0 b) 4 c) 4 Hydrogen- a) 0 b) 1 c) 1 Nitrogen - a) 1 b) 3 c) 3 Classify the bonding b...

Chem 219: Module 2 Questions What are hydrocarbons? - ANS - Molecules composed of only the elements carbon and hydrogen What are the two major classes of hydrocarbons? - ANS - Aromatic (benzene) and aliphatic (alkanes, alkenes, alkynes) What is the main source of hydrocarbons? - ANS - Fossil fuels like coal, petroleum, and natural gas obtained by mining and drilling. What are Alkanes? - ANS - They are saturated hydrocarbons because their skeleton is only composed of C-C single ...

CHEM 219 Module 2 problem set Questions with Verified Correct Answers The atomic radii of zirconium (Zr) and hafnium (Hf) are nearly the same despite the fact that hafnium has 32 more protons and electrons. Which of the following bests explains this phenomenon? - ANS - Hafnium contains electrons in the 4f orbitals. These 4f electrons do not effectively shield the higher nuclear charge and thus Zeff is higher than might be otherwise expected. Which of the following is true concerning succ...

CHEM 219 Module 1 problem set Questions with Verified Correct Answers [TOP TAKEN] On a piece of scratch paper, write out the Lewis Dot Diagram for each of the indicated elements and determine the following for each: a) The number of Lone Pairs the atom possesses in its valence shell. b) The number of Unpaired Electrons the atom possesses in its valence shell. c) The number of bonds the atom will form. Oxygen Carbon Hydrogen Nitrogen - ANS - Oxygen - a) 2 b) 2 c) 2 Carbon - a) 0 b...

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