Final answer:
The percent yield of a reaction completed at 97% is 97%, which is the efficiency of the reaction based on the actual versus theoretical yield.
Step-by-step explanation:
The question appears to be about calculating the percent yield of a chemical reaction, which is a measure of the efficiency of the reaction. The percent yield is determined by comparing the actual yield of a product to the theoretical yield. The actual yield is the amount of product actually obtained from the reaction, while the theoretical yield is the amount of product that would be obtained if the reaction went to completion based on stoichiometry.
In the student's question, if a reaction is completed at 97%, this means that the percent yield is 97%. Therefore, the answer to the question asking for the amount assuming that the reaction is completed at 97% is B) 97%.