Correct for fluorine, because it is made up of diatomic molecules (hence, F2), but not lithium, which is monoatomic.SCGirl said:
The limiting reactant in a stoichiometry question is the reactant that will be completely consumed first, limiting the amount of product that can be formed. To determine the limiting reactant, you must first convert the given amounts of each reactant to moles. Then, using the coefficients in the balanced equation, calculate the moles of product that would be formed if each reactant were to completely react. The reactant that produces the least amount of product is the limiting reactant.
To calculate the amount of product formed in a stoichiometry question, you must first determine the limiting reactant. Then, using the mole ratio between the limiting reactant and the product, calculate the moles of product that would be formed. Finally, convert the moles of product to the desired units using the molar mass of the product.
The theoretical yield is the amount of product that can be formed based on the stoichiometry of the reaction, assuming 100% efficiency. The actual yield is the amount of product that is obtained in a real-world experiment. The difference between the two is known as the percent yield, which can be calculated by dividing the actual yield by the theoretical yield and multiplying by 100%.
If there are excess reactants in a stoichiometry question, it means that one of the reactants will not be completely consumed in the reaction. To account for this, you must first determine the limiting reactant and the amount of product that would be formed based on the complete consumption of the limiting reactant. Then, subtract the amount of excess reactant from the amount of limiting reactant to calculate the actual amount of limiting reactant that was used in the reaction. Finally, use this amount to calculate the actual amount of product formed.
Balancing equations in a stoichiometry question ensures that the reaction is represented accurately, with the correct ratios between reactants and products. This is important because the coefficients in a balanced equation represent the mole ratio between reactants and products, which is necessary for accurate calculations in a stoichiometry problem.