To calculate the percent yield of the reaction, you can use the following formula:Percent Yield = Actual Yield / Theoretical Yield x 100In this case, the actual yield is 10 grams, and the theoretical yield is 12 grams. Plugging these values into the formula:Percent Yield = 10 / 12 x 100Percent Yield = 0.8333 x 100Percent Yield = 83.33%So, the percent yield of the reaction is 83.33%.