PreparED Study Materials
CHEM 135: General Chemistry for Engineers
School: University of Maryland
Number of Notes and Study Guides Available: 13
Notes
Study Guides
Videos
Balancing Equations: From Lead Sulfide to Ammonia Reactions
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This video shows you how to balance equations from the reaction of lead(II) sulfide with hydrochloric acid to ammonia's interaction with oxygen. Understand the nuances of atom balancing and grasp the precise stoichiometric relationships.
Ethane Hydrazine or Fluoromethane: Which is Liquid at Room Temp?
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Explore the states of ethane hydrazine and fluoromethane at room temperature by understanding intermolecular forces. Learn about nonpolar molecules dipole-dipole interactions and the powerful influence of hydrogen bonding. Discover why hydrazine stands out as most likely to be a liquid in everyday conditions.
Volume of 49.8g HCl Gas at STP: Finding the Answer in Liters
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This video guides viewers through the process of calculating the volume occupied by Hydrochloric acid gas or HCl at standard temperature and pressure. Using the molar mass of HCl and its properties as an ideal gas the tutorial comprehensively explains each step to determine the volume from a given mass at STP. A must-watch for understanding gas volume conversions in chemistry
Drawing Open-Chain Structures: A Visual Guide to Four Sugars
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Learn how to draw open-chain structures for various sugars, from ketotetrose to amino sugars. This video offers visual demonstrations of ketopentose, deoxyaldohexose, and more, highlighting key molecular differences.
Identify the 3' and 5' ends of the DNA segment AGTCAT
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This video discusses the fundamental concept of DNA structure, focusing on the identification of the 3' and 5' ends of a DNA segment, specifically highlighting the sequence AGTCAT and its importance in understanding DNA strand direction for processes like replication and transcription.
Comparing Structural Features of Sphingomyelins and Glycolipids
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This video explores the structural and functional differences between sphingomyelins and glycolipids, two types of lipids found in cell membranes, highlighting their commonalities in backbone and fatty acid composition and their distinctive roles in cell structure and recognition.






























