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                                    Balancing of a chemical equation. | 
                            
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Answer»  According to the law of conservations of mass, a balanced chemical equation has the same number of atoms of each element on both sides of the equation. Step I Write down the correct formulas of reactants and products. Step II Balance the number of atoms of elements other than H & O. Step III Balance the number of H and O if any. Step IV Verify the number of atoms for all reactants and products.  | 
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