3.9 Balancing Chemical Equations 99 Table 3.2 Information Conveyed by the Balanced Equation for the Combustion of Methane Reactants Products CH 4 (g) + 20 2 (g) 1 molecule + 2 molecules 1 mole + 2 moles 6.022 X 1023 molecules + 2 (6.022 X 10 23 molecules) 16 g + 2 (32 g) 80 g reactants ~ CO 2 (g) + 2H 2 0(g) ~ 1 molecule + 2 molecules ~ 1 mole + 2 moles ~ 6.022 X 1023 molecules + 2 (6.022 X 10 23 molecules) 44g + 2(18g) ~ 80 g products 3.9 ~ BaLancing ChemicaL Equations ing equations, start with the mplicated molecule. An unbalanced chemical equation is of limited use. Whenever you see an equation, you should ask yourself whether it is balanced. The principle that lies at the heart of the bal-ancing process is that atoms are conserved in a chemical reaction. The same number of each type of atom must be found among the reactants and products. It is also important to recognize that the identities of the reactants and products of a reaction are determined by experimental observation. For example,
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This note was uploaded on 12/13/2010 for the course CHEM 2301 taught by Professor Bill during the Spring '10 term at South Texas College.