Answer Happy

Can someone explain to me how he got 3.9 as well as the generalformula and the numbers he substituted for this problem.Thanks.
Which of the ff. obtained by free radical A 38.8% B 15.3% C. 30.6% D. 45.9% please help. Show how to compute and explain. Thanks. Show transcribed data Expert Answer Anonymous answered this 1,403 answers Answer: The correct answer is D. 45.9% ✰ answers.com 1° vs 2° Product ratio = 1 : 3.9 Explanation: The relative yields of the 3 possible chlorination products of 2,2-dimethylbutane are as follows: wrresponds to the % yield of 1- chloro-2, 2-dimethy) but ane 2,2-dimethyl but are chlorination with Thanks! % 1-chloro-2,2-dimethylbutane = [100 x (9 x 1)]/[(12 x 1 + 2 x 3.9)] = 100 x 9/19.8 = 45.5% % 3-chloro-2,2-dimethylbutane = [100 x (2 x 3.9)]/[(12 x 1 + 2 x 3.9)] = 100 x 7.8/19.8 = 39.4% % 1-chloro-3,3-dimethylbutane = [100 x (3 x 1)]/[(12 x 1 + 2 x 3.9)] = 100 x 3/19.8 = 15.1%