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某实验小组采用�白瓶法测定一湖泊中不同深度水层昼夜平均代谢率具体做法如下在湖泊不同深度取水样并测得溶氧量分装到�白玻璃瓶中将玻璃瓶 Template






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sketch 643 Happy Valentines
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sketch 5435
sketch 2646 Buzzy bee on flowers
sketch 2573 homer simpson
sketch 4388 Homer and the Cherry
sketch 5165 Marceline by Marvin Chrome
sketch 4953 Bird by Ervin Haxhija

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sketch 2828 One Direction Szabó Zoltán
sketch 5182 Inuyasha by Sepp Herberger
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sketch 2937 Spongebob by Kalana Namikaze
sketch 4934 Nami-Ki Roberto Castro Colimil
sketch 2950 Miss Fortune from League of Legends by Araceli GM
sketch 4974 Eminem by Juan Garcia
sketch 3431 Jimi Hendrix by Konvicted Rohit





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tomski某实验小组采用�白瓶法测定一湖泊中不同深度水层昼夜平均代谢率具体做法如下在湖泊不同深度取水样并测得溶氧量分装到�白玻璃瓶中将玻璃瓶 coloring
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某实验小组采用白瓶法测定一湖泊中不同深度水层昼夜平均代谢率具体做法如下在湖泊不同深度取水样并测得溶氧量分装到白玻璃瓶中将玻璃瓶 sketch template
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图甲是采用白瓶法测定某池塘夏季各深度24小时内的平均氧浓度变化曲线纵轴表示水池深度横轴表示瓶中O2的变化量g/m2﹒h图乙是某同学 sketch template
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某化学实验小组为测定一瓶混合溶液中可能含有Na2SO4NaClKNO3Na2CO3中一种或几种物质进行如下实验写出产生白色沉淀B sketch template
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图甲是采用白瓶法测定某池塘夏季各深度24小时内的平均氧浓度变化曲线纵轴表示水池深度横轴表示瓶中O2的变化量g/m2图乙是某同学 sketch template
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化学兴趣小组的同学进行了“测定空气中氧气的含量”的探究实验。（1）红磷燃烧的文字表达式为 。（2）实验探究步骤Ⅰ、将仪器按如图1装置连接好 sketch template
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某实验小组同学为测定一瓶久置“过氧化氢溶液 的溶质质量分数进行了如下操作取该溶液340g于烧杯中加入20g二氧化锰完全反应后称得 sketch template
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5．实验小组用如图装置测定空气中的氧气含量锥形瓶中空气的体积为100mL注射器中水的体积为25mL装置气密性良好．下列说法不正确的是 sketch template
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某化学兴趣小组对“空气中氧气含量的测定”展开探究。【实验回顾实验室常用红磷燃烧的方法测定空气中氧气的含量（如图1、图2），红磷燃烧的符号 sketch template
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27．学校化学兴趣小组的同学对一瓶溶液进行分析初步确定它是含有同种阴离子的MN的混合溶液继续分析的步骤如下 请根据上述实验过程及现象 sketch template
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2015南宁中考某化学兴趣小组的同学对实验室制取二氧化碳及相关性质进行一系列的探究活动。 1气体制取 按如图1所示的制取装置进行实验 sketch template
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某学习小组对二氧化碳展开了一系列探究。（一）验证CO2的性质。如图甲所示为验证CO2性质的实验装置。实验时，持续通入CO2，步骤Ⅰ：打开K1 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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题目某实验小组利用下图所示装置测定空气中氧气的含量 白磷P燃烧所需的最低温度为 40℃氧气体积约占空气总体积的多锥形瓶内空气 sketch template
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为测定某工业纯碱中碳酸纳的质量分数某活动小组同学采用气体法通过测定碳酸钠与酸反应产生的二氧化碳的质量来推算碳酸纳的质量．他们设计以下实验 sketch template
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某实验小组同学欲探究SO2的性质并测定空气中SO2的体积分数。他们设计了如图所示的实验装置请你参与探究并回答问题。1使用倒扣漏斗的作用 sketch template
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某实验小组的同学们为了测定珠江水中的各种成分到珠江边取水样恰好遇上下雨水比较浊你能帮助他们想办法使水变澄清吗写出要使用到的实验仪器和 sketch template
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采用 白瓶法测定池塘群落各深度日代谢的 平均氧浓度变化结果如下表请据表分析该池塘一昼夜生产氧气 和消耗氧气量各为多g．m 2 深度 sketch template
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35．某小组进行制作生态瓶观察其稳定性的实验正确的操作是 A．生态瓶内是无菌环境 B．生态瓶放置在光线良好的环境中 C．每天定时打开瓶盖通气 sketch template
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25．某实验小组为测定大理石中碳酸钙的质量分数利用一定质量的大理石与足量盐酸反应生成CO2的质量来进行分析测定 ——青夏教育精英家教—— sketch template
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题目I现代传感信息技术在化学实验中有广泛的应用某小组用传感技术测定喷泉实验中的压强变化来认识喷泉实验的原理如图 1 所示并测定 sketch template
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某实验小组欲以某浓度的盐酸和大理石为原料利用图Ⅰ所示装置纸杯并检验二氧化碳．1盐酸与碳酸钙反应的化学方程式为 ．2实验前根据 sketch template
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某实验小组按图1所示装置验证质量守恒定律 一天后 现锥形瓶内只有部分固体变为红棕色 天平示数始终不变 停止实验 出卷 sketch template
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30．每空1分画图3分共10分某实验小组的同学用伏安法测量小灯泡电功率待测小灯泡额定电压为38V小灯泡的额定功率估计在1W左右 sketch template
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题目某实验小组进行Cu和Fe2SO43溶液的实验实验探究过程如下实验装置实验操作与现象 ⅰ．加入Cu粉后充分振荡静置溶液 sketch template
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为探究某些生态因素在生态中的作用有人设计了如下实验在四个大小形状相同的生态瓶中加入等量的清水另外CD瓶中加入等量的河泥B sketch template
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某实验小组同学采用下列装置模拟硫酸工业的接触室制备SO3并测定实验条件下SO2的转化率．1实验过程中当V2O5表面红热后应将酒精灯移 sketch template
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题目某实验小组在探究“水的沸腾 实验中当水温升到90℃时每隔1min记录一次温度计的示数直到水沸腾5min后停止读数部分数据记录 sketch template
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实验小组研究盐酸氢氧化钙两种物质的化学性质做了如图所示8个实验．已知Na2CO3 CaCl2＝CaCO3↓ 2NaCl1实验后某试管 sketch template
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百度教育 sketch template
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某实验小组同学为测定一瓶久置“过氧化氢溶液 的溶质质量分数进行了如下操作取该溶液340g于烧杯中加入20g二氧化锰完全反应后称得 sketch template
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题目某化学实验小组的同学为探究和比较SO2和氯水的漂白性设计了如下的实验装置1实验室用装置A制备SO2某同学在实验时现打开A的 sketch template
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某学校化学实验小组成设计如图实验装置，制备并探究 高途 sketch template
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某实验小组在使用如图13所示装置来做“探究水的沸腾 的实验中用酒精灯给水加热至90℃时开始记时每隔l Min记录一次温度记录数据见下表 sketch template