Lecture 8: Percent Composition by Mass & Empirical/Molecular Formulas

LECTURE 8: Percent Composition by Mass, Empirical/Molecular Formulas, & an Introduction to Chemical Reactions

• Reading: Chapter 6: pp. 181-194, Chapter 7: pp.205-214
• Suggested Homework: Chapter 6 # 79-83 (odd), 85-99 (odd), 117, 119; Chapter 7: # 31-55 (odd)
• Practice Problems:
• Empirical Formulas Download Empirical Formulas
  + ANSWER KEY Download ANSWER KEY
• Balancing Reactions Links to an external site.
• Helpful Resources:
  
  • Empirical & Molecular Formulas:
  • Dehydration to find the Empirical Formula Download Dehydration to find the Empirical Formula
  • Khan Academy: Empirical and Molecular Formulas Links to an external site.
  • Khan Academy: Formula calculated from mass composition Links to an external site.
  • Khan Academy: Another mass composition problem Links to an external site.
  • Balancing Chemical Equations:
  • Khan Academy: Intro to Balancing Equations Links to an external site.
  • Simulation and Balancing Game:
  

   

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