Heres a question Im stuck with Crosslinked polymers consisting of 62 wt% ethylene and 38 wt% propylene may have elastic properties similar those for natural rubber. For a copolymer of this composition, determine the fraction of the ethylene mer. Express your answer with three decimal points. I honestly am lost with how to do this question... What I did was.... Found the weight of ethylene (28.052) and the weight of propylene (42.078)...then multipled by the percentages and got... 28.052*0.62 = 17.39 42.078*0.38 = 15.98 then.. fraction = 17.39/(15.98+17.39) I doubt this is right...any help would be much appreciated. Thanks in advance!