Dr. Miriam Douglass
Dr. Martin McClinton
Learners examine how chemists use moles to "count" atoms by weight. Examples are given.
Chemistry Math - Solving a Formula (Screencast)
By Laurel Maney
Students use algebra to rearrange formulas and solve for the missing volume, density, or mass quantity.
By Dr. Miriam Douglass, Dr. Martin McClinton
In this interactive and animated object, learners use solubility rules to predict when an insoluble ionic compound will precipitate in a double replacement reaction. Four step-by-step examples are given.
Macroscale vs. Nanoscale
By Karen Nordell
In this colorful, interactive object, learners examine how materials on the nanoscale compare with those on the macroscale. The focus is on the difference between macroscale and nanoscale gold in both color and melting point.
By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton
Learners examine how melting, vaporization, and sublimation require energy input while freezing and condensation release energy.
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