A student conducts a reaction and measures a 19.9 g yield. The theoretical yield of the reaction under the conditions used is 31.4 grams. What percent yield did the student achieve?
(19.9 g) / (31.4 g) = 0.634 = 63.4% yield
To calculate the percentage yield, you need to divide the actual yield (the measured yield) by the theoretical yield (the expected yield) and then multiply by 100.
In this case, the actual yield is given as 19.9 grams and the theoretical yield is given as 31.4 grams.
Using the formula:
Percentage yield = (Actual yield / Theoretical yield) x 100
Let's plug in the values:
Percentage yield = (19.9 grams / 31.4 grams) x 100
Calculating this, you get:
Percentage yield = 0.633 x 100
The percentage yield achieved by the student is 63.3%.