问题
填空题
向100g10%的氯化钠溶液中加入12.5g氯化钠固体，完全溶解后，所得溶液的溶质质量分数为______．
答案
向100g10%的氯化钠溶液中加入12.5g氯化钠固体，完全溶解后，所得溶液的溶质质量分数为
×100%=20%．100g×10%+12.5g 100g+12.5g
故答案为：20%．
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向100g10%的氯化钠溶液中加入12.5g氯化钠固体，完全溶解后，所得溶液的溶质质量分数为______．
向100g10%的氯化钠溶液中加入12.5g氯化钠固体，完全溶解后，所得溶液的溶质质量分数为
×100%=20%．100g×10%+12.5g 100g+12.5g
故答案为：20%．
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| 下面是王刚先生写的求职信及个人简历，请根据信的内容，将其简历补充完整，每个空格不得超过两个单词。 73 Xinchang Road, Beijing June 7, 2009 Dear sir, I am writing to introduce myself, with the hope of getting the job you advertised in Daily News. When I was a child, I was fond of English and always got good grades. In1994, after six years of hard work in Beijing No.4 Middle School, I entered People's University. I studied English there for four years. Luckily, I got my first job when I graduated. I taught English in Beijing No.4 Middle School from 1998 to 2001. Then I got the chance to receive further education in University of Hawaii in the US. That was a precious experience of my life. I learnt a lot during those two years, especially the differences between eastern and western cultures. I came back to People's University in 2003. I worked as an assistant (助手) for 2 years and then as a professor. So far I have got 8 years of working experience. I won lots of awards. I was an"Excellent Student" of People's University in 1997, and an "Outstanding Teacher" of Beijing No.4 middle school in 2000. Thank you for reading my letter, and I will appreciate it very much if you can reply soon. Yours sincerely, Wang Gang | |
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