The vulcanization of polyisoprene is accomplished with sulfur atoms according to Equation...

The vulcanization of polyisoprene is accomplished with sulfur atoms according to Equation 8.12. If 57 wt% sulfur is combined with polyisoprene, how many crosslinks will be associated with each isoprene repeat unit if it is assumed that, on the average, six sulfur atoms participate in each crosslink?

 (8.12)