Zinc and sulfur react with each other violently to produce zinc sulfide. The reaction is accompanied by a vigorous evolution of gas, heat, and light. 64.0 g Zn and 38.0 g S8 react to yield 33.5 g ZnS. 8 Zn(s) S8(s) 8 ZnS(s)

1) What is the theoretical yield of ZnS?
2) What is the percent yield of ZnS?