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Stoichiometry of Chemical Reactions

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Stoichiometry of Chemical Reactions ( stoichiometry-chemical-reactions )

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Chapter 4 Stoichiometry of Chemical Reactions 203 Figure 4.13 When H2 and Cl2 are combined in nonstoichiometric amounts, one of these reactants will limit the amount of HCl that can be produced. This illustration shows a reaction in which hydrogen is present in excess and chlorine is the limiting reactant. Link to Learning View this interactive simulation (http://openstaxcollege.org/l/16reactantprod) illustrating the concepts of limiting and excess reactants. Example 4.12 Identifying the Limiting Reactant Silicon nitride is a very hard, high-temperature-resistant ceramic used as a component of turbine blades in jet engines. It is prepared according to the following equation: 3Si(s) + 2N2(g) ⟶ Si3 N4(s) Which is the limiting reactant when 2.00 g of Si and 1.50 g of N2 react? Solution Compute the provided molar amounts of reactants, and then compare these amounts to the balanced equation to identify the limiting reactant. mol Si = 2.00 g Si × mol N2 = 1.50 g N2 × The provided Si:N2 molar ratio is: 1 mol Si 28.09 g Si 1 mol N2 28.09 g N2 = 0.0712 mol Si = 0.0535 mol N2

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