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是质量百分比的意思，也可以说是重量百分比。w是weight的缩写，即质量的意思。也可以用m/m表示，m是mass的缩写。如“5%(W/W)的硫酸”，即表示硫酸的质量比上溶液的总质量为5%。需要注意的是，溶质的质量分数只表示溶质质量与溶液质量之比，并不代表具体的溶液质量和溶质质量。
解析 w/w an abbreviation for "by weight," used in chemistry and pharmacology to describe the concentration of a substance in a mixture or solution.Properly speaking,2% w/w means that the mass of the substa... 分析总结。 比如73ww是质量分数73的意思吗两个w是什么单词的缩写...
答案解析 查看更多优质解析 解答一 举报 w/w an abbreviation for "by weight," used in chemistry and pharmacology to describe the concentration of a substance in a mixture or solution.Properly speaking,2% w/w means that the mass of the substa... 解析看不懂?免费查看同类题视频解析查看解答 ...
That means precip will taper from W to E during the next hour or so. FromWashington Post We think the Packers — playing at home — have the edge, with a 62 percent chance of grabbing the W and moving closer to the No. FromFiveThirtyEight ...
w/w an abbreviation for "by weight," used in chemistry and pharmacology to describe the concentration of a substance in a mixture or solution. Properly speaking, 2% w/w means that the mass of the substance is 2% of the total mass of the solution or mixture. The metric symbol...
in reaction 2 so wrong reaction taking place 2 Not all Mg reacts/ reaction does not go to completion in 2 (so not all energy released) Reaction 2 slower so more heat loss (ii) No, since (larger volume of solution means) smaller ∆T 1 OR Yes, since there would be a smaller T ...
解析 w/w an abbreviation for "by weight," used in chemistry and pharmacology to describe the concentration of a substance in a mixture or solution.Properly speaking,2% w/w means that the mass of the substa... 结果一 题目 关于腐植酸溶液(w/w)这个单位是什么意思呢?怎么来的由于天然水中腐植酸...
Coulometric determination of 6-thioguanine (I) was performed by means of an universal coulometric analyser equipped with two Pt electrodes in a generating ... W Ciesielski - 《Chemia Analityczna》 被引量: 0发表: 1991年 Comments on Identification and Determination of Volatile Chloroorganic Compounds...