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Balancing Chemical Equations

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PhET Interactive Simulations
University of Colorado Boulder


  • Chemical Equations
  • Conservation of Mass


How do you know if a chemical equation is balanced? What can you change to balance an equation? Play a game to test your ideas!

Sample Learning Goals

  • Balance a chemical equation.
  • Recognize that the number of atoms of each element is conserved in a chemical reaction.
  • Describe the difference between coefficients and subscripts in a chemical equation.
  • Translate from symbolic to molecular representations of matter.
Version 1.1.11