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In a balanced chemical equation, the number “3” before
means there are 3 moles of iron(II) chloride involved in the reaction. This ensures the equation is balanced and follows the law of conservation of mass.
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The term "
" indicates that three molecules of iron(II) chloride (FeCl₂) are involved in the reaction. This means that for every stoichiometric unit of the reactants or products involving FeCl₂, you’ll be considering three times the amount or concentration in your calculations, balancing out the equation’s ratios.
In real-world applications, knowing how to read and interpret these coefficients is crucial in fields like chemistry, engineering, and environmental science. For instance, if you’re designing a chemical reaction in an industrial process, understanding the quantity of reactants will help you predict the yield and ensure safety measures are in place to manage the reactions efficiently!