Mole-to-mole calculations are used to determine

• A. The volume of solvent
• B. The amount of product formed in a reaction
• C. The reaction rate
• D. The percent yield

Answer: (B)

Mole-to-mole calculations use the coefficients in a balanced equation to translate amounts in moles from one substance to another, predicting how much product will be formed. This is the way we determine the amount of product produced from given reactants—assuming the reaction goes to completion and using the appropriate mole ratios. For example, if the reaction shows 2 moles of A produce 1 mole of B, starting with 4 moles of A yields 2 moles of B, while starting with 3 moles of A gives 1.5 moles of B. This gives the theoretical yield.

Volume of solvent isn’t set by stoichiometry and depends on other factors like dilution and concentration. Reaction rate comes from kinetics, not stoichiometric amounts. Percent yield relates actual product obtained to the theoretical amount, with the theoretical amount itself derived from mole-to-mole calculations.