How Do You Calculate the Fraction of Ethylene in a Copolymer?

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SUMMARY

The calculation of the fraction of ethylene in a copolymer consisting of 62 wt% ethylene and 38 wt% propylene involves determining the weight contributions of each component. The weights of ethylene (28.052 g/mol) and propylene (42.078 g/mol) are multiplied by their respective percentages to find their contributions: 17.39 g for ethylene and 15.98 g for propylene. The fraction of ethylene is then calculated using the formula: fraction = weight of ethylene / (weight of ethylene + weight of propylene), resulting in a fraction of 0.521 when expressed to three decimal points.

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Heres a question I am 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!
 
Last edited:
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Sorry I think I posted this in the wrong section.

My apologies
 

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