What is the percentage yield for a reaction if you predicted the formation of 21 grams of C6H12 and actually recovered only 3.8 grams?

[(actual yield/theoretical yield)]*100 = ? = % yield

To calculate the percentage yield for a reaction, you can use the formula:

Percentage yield = (Actual yield / Theoretical yield) x 100

The theoretical yield is the amount of product that is expected to be formed based on stoichiometry and the balanced chemical equation.

In this case, the predicted formation of 21 grams of C6H12 is the theoretical yield, and the actually recovered 3.8 grams is the actual yield.

So, plugging in the values:

Percentage yield = (3.8 / 21) x 100

Calculating this:

Percentage yield = 0.18 x 100

Percentage yield = 18%

Therefore, the percentage yield for this reaction is 18%.