fullfive+街边树下
@广芝2653：“黄铜”是铜锌合金,具有较机械性能,比纯铜耐腐蚀,街头许多“金色”饰品就是用它来制作的.现取20.0g某种黄铜投入100g某浓度的稀硫酸中,完全反应... - 作业帮
程点15021624338…… [答案] (1)产生氢气的质量为 20.0g+100g-119.8g=0.2g (2)设参加反应的锌的质量为x,生成的硫酸锌的质量为y. Zn+H2SO4═ZnSO4+H2↑ 65 161 2 x y 0.2g 65 x= 161 y= 2 0.2g,x=6.5g,y=16.1g 黄铜中铜的质量分数为 20.0g−6.5g 20.0g*100%=67.5% 剩余溶液...
@广芝2653：...much. When I left school at eighteen I got a job at a zoo as astudent keeper. Now five years later things have changed - I have passed my exams and I am a full ... - 作业帮
程点15021624338…… [答案] 1-5: CBCAB
@广芝2653：为什么我进街头篮球说我有反挂系统? -
程点15021624338…… 最好.最直接的办法:重新下载街球 %100解决 (重新下之前一定要把以前的删干净)
@广芝2653：黄铜是铜锌合金,比纯铜耐腐蚀,街头许多'金色'饰品就是用它来制作的,现取20.0g某种黄铜投入100g某浓度的稀硫酸中,完全反应后生成的溶液和残余... - 作业帮
程点15021624338…… [答案] (1)产生氢气的质量为 20g+100g-119.8g=0.2g Zn + H2SO4 === ZnSO4 + H2↑ 65 98 161 2 x Z y 0.2g 65/x=161/y=2/0.2g=98/Z x=6.5g y=16.1gZ=9.8g (2)这种黄铜中铜的质量分数为(20g-6.5g)/20g*100%=67.5% 这种硫酸溶液溶质质量分数9.8g/100g*...
@广芝2653：...either fed normally or had an apple extract(浓缩物) added to their diet.It turned out that those fruit flies that were given apple extract lived about 55 days—five... - 作业帮
程点15021624338…… [答案] D You are probably familiar with the saying:An apple a day keeps the doctor away. A recent research carried out by the ... added to their diet. It turned out that those fruit flies that were given apple extract lived about 55 days—five days longer than the flies ...
@广芝2653：有没有一个标准的英文论文的提纲,是论文是用英语写的,而不是和英语有关的论文噢~! - 作业帮
程点15021624338…… [答案] How to Make and Use an Essay Outline An essay outline is probably the most important friend you will have while writing your... it is simply an organized list of ideas for the essay. Five Paragraph Essay Outline A five paragraph essay outline has three ...
@广芝2653：为什么都说街头PG跑动最快? -
程点15021624338…… LZ,我想你可能忘了控球这个能力了.PG控球能力可比SG强.G的速度可是控球和跑动综合下来的呀```
@广芝2653：从街头语文中学到了什么 -
程点15021624338…… 学到了自由的意义
@广芝2653：...cost you $2,000.＂ Arnold thought about this.Two thousand dollars was a lot of money.At last he said,＂All right.But for $2,000 I want a complete history.I want ... - 作业帮
程点15021624338…… [答案] C由第二句可知 A由第三行和第四行可知 C由全文可知 B由最后一句可知
程点15021624338…… [答案] (1)产生氢气的质量为 20.0g+100g-119.8g=0.2g (2)设参加反应的锌的质量为x,生成的硫酸锌的质量为y. Zn+H2SO4═ZnSO4+H2↑ 65 161 2 x y 0.2g 65 x= 161 y= 2 0.2g,x=6.5g,y=16.1g 黄铜中铜的质量分数为 20.0g−6.5g 20.0g*100%=67.5% 剩余溶液...
@广芝2653：...much. When I left school at eighteen I got a job at a zoo as astudent keeper. Now five years later things have changed - I have passed my exams and I am a full ... - 作业帮
程点15021624338…… [答案] 1-5: CBCAB
@广芝2653：为什么我进街头篮球说我有反挂系统? -
程点15021624338…… 最好.最直接的办法:重新下载街球 %100解决 (重新下之前一定要把以前的删干净)
@广芝2653：黄铜是铜锌合金,比纯铜耐腐蚀,街头许多'金色'饰品就是用它来制作的,现取20.0g某种黄铜投入100g某浓度的稀硫酸中,完全反应后生成的溶液和残余... - 作业帮
程点15021624338…… [答案] (1)产生氢气的质量为 20g+100g-119.8g=0.2g Zn + H2SO4 === ZnSO4 + H2↑ 65 98 161 2 x Z y 0.2g 65/x=161/y=2/0.2g=98/Z x=6.5g y=16.1gZ=9.8g (2)这种黄铜中铜的质量分数为(20g-6.5g)/20g*100%=67.5% 这种硫酸溶液溶质质量分数9.8g/100g*...
@广芝2653：...either fed normally or had an apple extract(浓缩物) added to their diet.It turned out that those fruit flies that were given apple extract lived about 55 days—five... - 作业帮
程点15021624338…… [答案] D You are probably familiar with the saying:An apple a day keeps the doctor away. A recent research carried out by the ... added to their diet. It turned out that those fruit flies that were given apple extract lived about 55 days—five days longer than the flies ...
@广芝2653：有没有一个标准的英文论文的提纲,是论文是用英语写的,而不是和英语有关的论文噢~! - 作业帮
程点15021624338…… [答案] How to Make and Use an Essay Outline An essay outline is probably the most important friend you will have while writing your... it is simply an organized list of ideas for the essay. Five Paragraph Essay Outline A five paragraph essay outline has three ...
@广芝2653：为什么都说街头PG跑动最快? -
程点15021624338…… LZ,我想你可能忘了控球这个能力了.PG控球能力可比SG强.G的速度可是控球和跑动综合下来的呀```
@广芝2653：从街头语文中学到了什么 -
程点15021624338…… 学到了自由的意义
@广芝2653：...cost you $2,000.＂ Arnold thought about this.Two thousand dollars was a lot of money.At last he said,＂All right.But for $2,000 I want a complete history.I want ... - 作业帮
程点15021624338…… [答案] C由第二句可知 A由第三行和第四行可知 C由全文可知 B由最后一句可知
