Final answer:
The balanced chemical reaction equation in stoichiometry determines the number of moles and their relationships between reactants and products, including identifying the limiting reactant and calculating yields. So the correct option is a.
Step-by-step explanation:
The balanced chemical reaction equation in stoichiometry is used to determine the number of moles and their relationships between reactants and products. This involves using coefficients from the equation to derive stoichiometric factors for computations. Using this information, you can:
- Balance the chemical equation for the reaction.
- Convert from the mass of reactants and products to moles using molar masses.
- Use mole ratios to determine the limiting reactant.
- Based on the number of moles of the limiting reactant, use mole ratios to determine the theoretical yield.
- Calculate the percent yield by comparing actual yield to theoretical yield.
- Convert from moles of product to mass of product.
Therefore, the correct answer to the student's question is 'a) Determine the number of moles and their relationships between reactants and products'.