WebSep 23, 2012 · "A blend contains 45wt% polystyrene and 55wt% polypropylene. What is the mole fraction of polystyrene in the blend?" The Attempt at a Solution I think I remember having to change the percents into grams, then find the molar masses of the total blend and the polystyrene. Then divide the grams by the molar masses leaving moles/moles --> so …
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Finding mole fraction of polymers from weight percents
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