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.

Concepts

mass, moles, the periodic table, molar mass, atomic mass

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Additional Tags

science

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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
  

• This video is hosted on YouTube

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

SL.9-10.2