PreparED Study Materials
CHB 1021: Introductory Chemistry (CHEM 1021, Dr Plath)
School: University of Colorado
Number of Notes and Study Guides Available: 6
Notes
Study Guides
Videos
Calculating Backpacker's Fuel Weight: White Gas Density
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Learn how to determine the weight of white gas carried by a backpacker using its density. A valuable skill for hikers and campers.
Classifying the Boiling of Water: Physical or Chemical Change? Justify
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This video tackles the classification of boiling water as either a physical or chemical change, examining the provided options. We conclude that boiling is a physical change, as the water's chemical composition remains the same during the transition from liquid to gas.
CS?, SO?, CH?, & CH?Cl: Are They Polar or Nonpolar Molecules?
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Explore the polarity of Carbon disulfide, Sulfur dioxide, Methane, and Chloromethane. Learn how molecular shape influences electron distribution. Understand which molecules possess a net dipole moment and which ones don't.
Determining Moles of Released Ions in Dissolution Reactions
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When an ionic compound dissolves in water, it undergoes dissociation into its constituent ions. The total moles of ions released is determined by adding up the moles of each ion generated during this dissociation process. In the case of (a) disodium hydrogen phosphate (Na?HPO?), it dissociates into two sodium ions and one hydrogen phosphate ion. For (b) copper(II) sulfate pentahydrate (CuSO? · 5H?O), it dissociates into one copper ion and one sulfate ion. In (c), nickel(II) chloride (NiCl?) diss
What makes bubbles when water boils?
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When water boils, bubbles rise to the surface, but what's in these bubbles? Let's evaluate the options. Option d, water vapor, is correct; the bubbles during boiling are primarily composed of water vapor, the gaseous state of water.