质量分数
English translation: mass fraction
| 12:09 Feb 17, 2016 |
| Chinese to English translations [PRO] Science - Chemistry; Chem Sci/Eng | |||||||
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|  Selected response from: Linda Yang Local time: 07:47 | ||||||
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| Summary of answers provided | ||||
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| 5 +1 | mass fraction |
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| 4 +1 | Percentage by mass |
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| 5 | weight percent |
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Answers
4 hrs confidence: 
peer agreement (net): +1
peer agreement (net): +1Percentage by mass Explanation: OR mass fraction. https://en.wikipedia.org/wiki/Mass_fraction_(chemistry) http://baike.baidu.com/link?url=IaylXf9IDX0aZABtu_GShubUWLtb... |
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9 hrs confidence:
weight percent Explanation: it in weight percent (or mass percent, if you prefer). Weight Percent Another similar way of expressing the concentration of a solution is to express it in weight percent (or mass percent, if you prefer). Weight percent = weight of solute weight of solution x 100% You've done this kind of calculation earlier - last term in the lesson on composition. You may already be prepared to answer the questions in exercise 2 in your workbook. If so, do that and check your answers at the bottom of the page. If not, read on. As an example, let's consider a 12% by weight sodium chloride solution. Such a solution would have 12 grams of sodium chloride for every 100 grams of solution. To make such a solution, you could weigh out 12 grams of sodium chloride, and then add 88 grams of water, so that the total mass for the solution is 100 grams. Since mass (unlike volume) is conserved, the masses of the components of the solution, the solute and the solvent, will add up to the total mass of the solution. 12 % NaCl solution = 12 g NaCl 100 g solution 12 g NaCl (12 g NaCl + 88 g water) = 12% NaCl solution To calculate the mass percent or weight percent of a solution, you must divide the mass of the solute by the mass of the solution (both the solute and the solvent together) and then multiply by 100 to change it into percent.http://dl.clackamas.edu/ch105-04/weight.htm -------------------------------------------------- Note added at 10 hrs (2016-02-17 22:24:45 GMT) -------------------------------------------------- 单位的缩写为wt% |
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1 day 9 mins confidence: peer agreement (net): +1
peer agreement (net): +1mass fraction Explanation: https://en.wikipedia.org/wiki/Mass_fraction_(chemistry) |
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