The experiment should theoretically yield 3.50 g of the product. However during the experiment it can yield only 3.10 g of the product. actual yield is lesser than the theoretical yield, therefore we need to find the percentage yield. Percentage yield can be calculated using the following equation Percent yield = 3.10 g / 3.50 g x 100% = 88.6%
Since a radical is formed as part of the product it means it's a propagation step and not a termination step, at termination no free radical exist as product