If the actual and theoretical yield are the same the percent yield is 100. It is calculated to be the experimental yield divided by theoretical yield multiplied by 100. Percentage Yield Mass of Actual Yield x 100.
KnownActual yield 149 gTheoretical yield 157.
Balance The Chemical Equation. The percentage yield can be calculated using the mass of the actual product obtained and the theoretical mass of the product calculated using the balanced equation of the reaction. The yield is calculated from the actual molar yield and the theoretical molar yield 15 mol 20 mol 100 75. The amount of product actually produced is called the actual yield.