Question

an organic synthesis to make the pain reliever acetominophen is supposed to produce 280 kg of product but instead produces 70 kg of waste in addition to the acetaminophen. what is the percent yield?
options: 25%, 80%, 20%, 75%

Explanation:

Step1: Calculate total mass

Total mass = Desired product mass + Waste mass
$280\ \text{kg} + 70\ \text{kg} = 350\ \text{kg}$

Step2: Compute percent yield

Percent yield = $\frac{\text{Actual product mass}}{\text{Total mass}} \times 100\%$
$\frac{280}{350} \times 100\% = 80\%$

Answer:

80%