题目

将13.0g锌投入400mL某浓度的盐酸中,锌和盐酸恰好完全反应.求:(1)发生反应的离子方程式是: .(2)反应中生成的H2在标准状况下的体积 .(3)反应后所得溶液的物质的量浓度 (反应前后溶液体积变化忽略不计). 答案:考点:化学方程式的有关计算 专题:计算题 分析:(1)锌与氢离子反应得到锌离子与氢气;(2)根据n=mM计算Zn的物质的量,再根据方程式计算氢气的物质的量,根据V=nVm计算氢气的体积;(3)锌和盐酸恰好完全反应,溶液中溶质为ZnCl2,根据Zn元素守恒,则n(ZnCl2)=n(Zn),再根据c=nV计算溶液浓度Nat lived in a small town in England. He always stayed in England for his vacation, but last year he thought, “I’m never outside this country. All my friends go to Spain , and they like it very much. So this year I’m going there, too.”First he went to Madrid (马德里) and stayed in a small hotel for a few days. On the first morning he went out for a walk. In England people drive on the left, but in Spain they drive on the right. Nat forgot about this and when he was crossing a busy street, a bike knocked (撞) him down.Nat lay (躺) on the ground for a few seconds and then he sat up and said, “Where am I ?”An old man was selling maps at the side of the street, and he at once came to Nat and said, “Map of the city, sir ?”1.Nat always spent his vacation______A.in MadridB.in SpainC.outside his countryD.in England2.One year, Nat went to _______A.EnglandB.LondonC.SpainD.America3.The exact (准确) Chinese word for “busy” in this story may be “______”A.忙碌的B.紧张的C.热闹的D.热烈的4.“Map of the city, sir ?” means “______”A.Do you have a map of the cityB.Show me a map of the city, pleaseC.Do you want to buy a map of the city, sir ?D.Do you want to have a look at the map of the city5.The end (结尾) of the story is ______A.sadB.happyC.interestingD.boring
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