PreparED Study Materials
CHEM 1440: Introductory Biology: Comparative Physiology
School: Cornell University
Number of Notes and Study Guides Available: 0
Videos
Calculate the Volume of 3.00 Moles of Kr(g) at STP
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This video delves into the principles of gas behavior at standard temperature and pressure (STP) and how to determine the volume occupied by a given number of moles of gas under these conditions.
Converting Various Units: Weight, Time, Height, and Volume
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This video focuses on unit conversions and the practical use of conversion factors to translate quantities between different units. It provides clear examples of converting 70 kilograms to pounds, translating 14 billion years into seconds, changing the height of a basketball player from feet and inches to meters, and converting cubic meters to liters, illustrating the importance of this skill in various scientific and everyday scenarios.
Classify: (a) Mixture (b) Element (c) Mixture (d) Compound
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In this video, we classify substances as elements, compounds, or mixtures, with air and soy sauce as mixtures, iron as an element, and table salt as a compound.
Hydrogen Peroxide Molecule Classification
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This discussion explores the nature of hydrogen peroxide as a compound composed of hydrogen and oxygen atoms and categorizes it as either a homoatomic or heteroatomic molecule.
Orthorhombic Unit Cell: Decoding Nickel Sulfate's Crystal Density
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The video offers an insightful look into the orthorhombic unit cell, a unique crystal lattice structure. By exploring nickel sulfate's unit cell and its specific dimensions, we determine both the number of formula units and the density of this crystalline structure.
Chromium & Oxygen: Limiting Reactants & Chromium(III) Oxide Formation
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Unravel the reaction of chromium and oxygen forming chromium(III) oxide. Examine different scenarios to determine the limiting reactant using stoichiometric ratios. Understand how to predict product amounts through these calculations.
















