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题目在下面,分只有20了...总分有40还有一题要问...求体谅谢啦apolymersamplecombinesfivedifferentmolecularweightfractions,eachofequalweight.thesefractionsincreaseinmolecularweightfrom20000to100000in20000mol
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题目在下面,分只有20了 ...总分有40 还有一题要问...求体谅谢啦
a polymer sample combines five different molecular weight fractions,each of equal weight .these fractions increase in molecular weight from 20000 to 100000 in 20000 molecular weight increments.calculate the number average,weight average ,and z-average molecular weights of this sample to have a broad or narrow molecular weight distribution?
a polymer sample combines five different molecular weight fractions,each of equal weight .these fractions increase in molecular weight from 20000 to 100000 in 20000 molecular weight increments.calculate the number average,weight average ,and z-average molecular weights of this sample to have a broad or narrow molecular weight distribution?
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结合聚合物分子量样品五种不同馏分,每个重量增加这些分数相等分子量从20000增加到100000年的20000分子量increments.数量,计算平均体重平均分子量,z-average这样品有宽或窄分子量分布?
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