Chemistry: Percent Composition

How much oxygen is in water? Is it the same as the chemical formula? Learners observe the differences between a substance's formula and its percent composition with a video from Socratica's Chemistry Lessons series. The narrator illustrates the relationship between the formula and atomic mass, then uses both to calculate the percent composition of water and glucose.

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CCSS: Adaptable
Instructional Ideas

  • Use the video as a remediation tool to help struggling learners
  • Show the video in class and pause as pupils work the problems themselves
Classroom Considerations

  • Take a moment to review how to determine molar mass before showing the video
Pros

  • The resource uses colored atoms to help scholars keep track of the number of each as they work
  • Performs all calculations in a series of easy-to-follow steps, which promotes good planning skills
Cons

  • None
Common Core