PreparED Study Materials
CHEM 121: General Chemistry I
School: University of North Dakota
Number of Notes and Study Guides Available: 11
Notes
Study Guides
Videos
Number of molecules in 3.5g H?O, 56.1g N?, 89g CCl?, 19g C?H??O?
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This video shows how to determine the number of molecules in a given sample by utilizing the concept of moles, Avogadro's number (6.022 x 10²³), and the molar mass of the substance. It provides step-by-step calculations for different substances, converting mass to the number of molecules and highlighting the versatile application of this approach.
Identifying Fundamental Units in Rb?O, N?, Fe(NO?)?, and N?F?
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In this exploration, we delve into the fundamental units of various substances, whether they are single atoms, molecules, or formula units. We examine ionic compounds like Rb?O and Fe(NO?)?, characterized by formula units as their basic components, and covalent compounds like N? and N?F?, where molecules are the fundamental units.
Reaction Rate Impact: Ethanol, Tert-Butyl Bromide & Temp
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Explore the intricacies of reaction rates with varying concentrations of ethanol and tert-butyl bromide. Understand the principles of SN1 reactions and the impacts of temperature on rate acceleration. Grasp the core elements that influence and optimize chemical reactions in diverse applications.
Heat Absorption: Lead Weight's Final Temperature
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Explore the process of heat absorption and discover how to calculate the final temperature of a lead fishing weight after absorbing a specific amount of heat.
Deriving the Perfect Gas Equation from Gas Laws
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Learn how the ideal gas equation is derived from Boyle's law, Charles’ law, and Avogadro's principle, unraveling the fundamentals of gas behavior.
BrF?, ClF?, & IF? Lewis Structures: Which Don't Obey Octet Rule?
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Unravel the Lewis structures of BrF?, ClF?, and IF? and their relationship with the octet rule. Examine how fluorine bonds with bromine, chlorine, and iodine. Identify molecules that deviate from the standard octet distribution.