A balanced chemical equation can tell us the number of reactant and product particles (ions, atoms,
molecules or formula units) that are necessary to conserve mass during a chemical reaction. Typically
when we balance the chemical equation we think in terms of individual particles. However, in real life
the reaction represented by an equation occurs an unimaginable number of times. Short of writing very
large numbers (1023 or larger) in front of each chemical in the equation, how can we interpret chemical
equations so that they more realistically represent what is happening in real life? In this activity you will
explore the different ways a chemical reaction can be interpreted.
Model 1 - A Chemical Reaction
N2(g) + 3H2(g) ->
2NH₂(g)
1. Consider the reaction in Model 1.
a. What are the coefficients for each of the following substances in the reaction?
N₂

H₂

NH₂

A balanced chemical equation can tell us the number of reactant and product particles ions atoms molecules or formula units that are necessary to conserve mass class=

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