Question

the use of percent yield calculations to assess efficiency.

Explanation:

Step1: Define percent - yield formula

Percent yield = $\frac{\text{Actual yield}}{\text{Theoretical yield}}\times100\%$

Step2: Explain its use for efficiency

It shows how much of a product is actually made compared to what could be made theoretically. Higher percent - yield means higher efficiency in a chemical reaction.

Answer:

Percent yield calculations are used to compare actual and theoretical yields, thus assessing the efficiency of a chemical process.