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某课外活动小组的同学对一包含碳的铜粉样品进行铜的质量分数的测定采用如图所示的装置进行实验气密性良好图中铁架台等仪器已略去．试回答下列 Template






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sketch 3083 Great illustration Ali Hänel

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tomski某课外活动小组的同学对一包含碳的铜粉样品进行铜的质量分数的测定采用如图所示的装置进行实验气密性良好图中铁架台等仪器已略去．试回答下列 coloring
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某课外小组的同学以“铁铜银的化学性质 为课题进行学探究活动请根据已学知识完成下列探究问题．提出问题铁铜银的属活动性顺序是 sketch template
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某化学兴趣小组的同学对一份固体样品进行了探究．通过实验已确定该样品由氧化铁和铁粉混合而成．他们称取了136g固体样品用图1所示的装置进行 sketch template
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14．某课外活动小组的同学为了探究霉菌生长的环境条件做了若干组实验对照实验的关键是控制单一变量实验结果如表所示．物质 5℃潮湿25 sketch template
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某校学生课外活动小组的同学设计下图所示实验装置用来验证一氧化碳具有还原性回答下列问题 1装置B中最适宜的试剂是 2装置C的 sketch template
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某班化学课外活动小组的同学设计了一套能验证一氧化碳性质并带有趣性的实验效果明显实验装置如下图所示当打开开关a通入适量的一氧化碳后 sketch template
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32．某化学课外小组同学用如图所示实验验证质量守恒定律 1某甲同学用A装置探究质量守恒定律实验步骤如下 如图将烧杯放在天平上用砝码 sketch template
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某校化学课外活动小组的同学设计了一套能验证一氧化碳性质并带有一定趣性的实验实验装置如图所示当打开开关a通人适量的一氧化碳后关闭开关a sketch template
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27．某课外活动小组的同学在老师的帮助下探究用赤铁矿炼铁的主要反应原理它们设计的实验装置如下图 图1 图2 回答下列问题 1写出用 sketch template
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某课外活动小组加热氧化铜和炭粉的混合物得到的铜粉中含有炭粉他们用下图所示的装置对获得的铜粉样品进行实验分析以定样品中铜的质量分数图 sketch template
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某课外活动小组的同学对一包含碳的铜粉样品进行铜的质量分数的测定采用如图所示的装置进行实验气密性良好图中铁架台等仪器已略去．试回答下列 sketch template
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某班化学课外活动小组的同学设计了一套能验证一氧化碳性质并带有趣性的实验效果明显实验装置如下图所示当打开开关a通入适量的一氧化碳后 sketch template
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某化学课外活动小组为同学们表演节目时他们在白纸上用干净的毛笔蘸取甲溶液画上“花 再用另一只毛笔蘸取乙溶液画上“叶 将白纸挂在墙上待晾干 sketch template
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某课外活动小组的同学为测定一瓶BaCl2溶液溶质的质量分数做了以下实验请回答有关问题1从试剂瓶中取出10gBaCl2溶液于一个洁净的 sketch template
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某校课外活动小组的同学在老师的帮助下 探究用赤铁矿石主要成分是Fe2O3炼铁的主要反应原理他们设计的实验装置如下图回答下列问题 sketch template
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某校化学课外活动小组的同学设计了一套能验证一氧化碳性质并带有一定趣性的实验效果明显．实验装置如图所示当打开开关a通入适量的一氧化碳后 sketch template
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17．某物理课外活动小组在用单测重力加速度的实验中测出了不同长在进行实验数据处理时 1甲同学根据公式并计算重力加速度若他测 sketch template
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某校课外活动小组的同学在老师的帮助下探究用赤铁矿主要成分是Fe2O3炼铁的主要反应原理．他们设计的实验装置如图所示．回答下列问题1 sketch template
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入侵物种会对当地群落结构和生物多样性产生灾难性影响．某课外探究小组的同学对某一块荒地的某种外来入侵植物和几种本地植物的种群密度进行了连续五年 sketch template
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题目学校生物学习兴趣小组的学生进行生物课外实践活动时调查了某条河流的水质变化图示为该河流及一家养殖场的位置并且小组同学现养殖场的粪便 sketch template
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五2班有学生50人某同学对全班同学参加兴趣小组的情况作了调查每人只能参加一个兴趣小组统计图如图所示．参加兴趣小组的各有多人 sketch template
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某课外活动小组的同学为了研究属腐蚀的条件进行了如下探究活动请根据以上实验及现象回答下列问题1该实验的结论是铁生锈是铁与 等 sketch template
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某课外活动小组的同学在实验室做锌与浓硫酸反应的实验中甲同学认为产生的气体是二氧化硫而乙同学认为除二氧化硫气体外还可能产生氢气为了验证 sketch template
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某班化学课外活动小组的同学设计了一套能验证一氧化碳性质并带有趣性的实验效果明显实验装置如下图所示当打开开关a通入适量的一氧化碳后 sketch template
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某课外活动小组加热氧化铜和炭粉的混合物得到的铜粉中含有炭粉他们用下图所示的装置对获得的铜粉样品进行实验分析．以测定样品中铜的质量分数 sketch template
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