In a chemical reaction, if the theoretical yield is 50 grams and the actual yield is 40 grams, what is the percent yield?

• A. 80%
• B. 90%
• C. 70%
• D. 75%

Answer: (A)

Verified step by step guidance

1. Understand the concept of percent yield: Percent yield is a measure of the efficiency of a reaction, calculated by comparing the actual yield to the theoretical yield.
2. Identify the given values: The theoretical yield is 50 grams, and the actual yield is 40 grams.
3. Use the formula for percent yield: \( \text{Percent Yield} = \left( \frac{\text{Actual Yield}}{\text{Theoretical Yield}} \right) \times 100 \% \).
4. Substitute the given values into the formula: \( \text{Percent Yield} = \left( \frac{40}{50} \right) \times 100 \% \).
5. Simplify the expression to find the percent yield: Calculate the fraction \( \frac{40}{50} \) and then multiply by 100 to get the percent yield.