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随堂反馈

1．向某容器里通入VLCO2气体,并加入少量的Na2O2固体,在同温同压下测得容器内气体为WL,则被吸收的CO2气体的体积为（）

A. (V-W)L

B. 2WL

C. 2(V-W)L

D. VL

2．通常状况下，将CO、O2的混合气体400mL置于密闭的容器内点燃，再恢复原状况，气体体积为300mL，则原混合气体中CO的体积可能是（）

A. 200mL

B. 300mL

C. 100mL

D. 50mL

3．2.8g铁片放入100mL硫酸铜溶液中，待固体的质量不再增加时，将固体取出，经冲洗、干燥、称重，质量为3.2g（假设溶液体积不变），原硫酸铜溶液物质的量浓度可能为（）

A. 0.05mol/L

B. 0.5 mol/L

C. 0.1mol/L

D. 1.5mol/L

4．常温下，向20L真空容器中通入amolH2和bmolO2（a、b都是正整数，且a≤4，b≤4），反应完全后，容器内可能达到的最大密度是（）

A. 5.6 g/L

B. 9.6g/L

C. 11.2g/L

D. 56g/L

5．把2.27gNaHCO3和Na2CO3·10H2O组成的混合物溶于水配成100mL溶液，其中C(Na＋)=0.2mol·L-1，若将等质量的该混合物加热至恒重，所得固体质量为（）

A. 0.84g

B. 1.06g

C. 1.43g

D. 2.27g

6．2.1g平均分子量为7.2的CO与H2组成的混合气体与足量的O2充分燃烧后,立即通入足量的Na2O2固体,固体质量将增加（）

A. 2.1g

B. 3.6g

C. 7.2g

D. 无解

7．在甲、乙两个坩埚中分别盛有等质量的NaHCO3，将甲坩埚充分加热后冷却，再加入足量的盐酸，乙不经过加热直接加入足量盐酸，反应完全后，甲、乙两坩埚中实际参加反应的盐酸的物质的量之比约为（）

A. 1:1.6

B. 1.6:1

C. 2:1

D. 1:1

8．已知在同温同压下，10mLA2气体和30mLB2气体恰好完全反应，生成20mLC，则C的化学式为（）

A. AB

B. A2B

C. AB2

D. AB3

9．两种金属组成合金30克，与氯气完全反应，消耗氯气71克，则该合金的组成可能是（）

A. Mg、Fe

B. Na、Al

C. K、Zn

D. Cu、Ag

10．在一定条件下，11.6gCO2和H2O的混合气与足量的Na2O2固体充分反应后,固体质量增加了3.6g，则原混合气的平均相对分子质量为（）

A. 5.8

B. 11.6

C. 18.8

D. 23.2

11．在NaCl、MgCl2和MgSO4三种盐配成的混合液中，若Na+为0.1mol，Mg2+为0.25mol，Cl－为0.2mol，则SO42－为（）

A. 0. 5mol

B. 0.15mol

C. 0.2mol

D. 0.25mol

12．已知aM2+ + bO2 +4H+ ==cM3+ +dH2O，则系数c的值为（）

A. 1

B. 2

C. 3

D. 4

13．CO和CO2混合气体在标准状况下的密度为1.79g/L，则混合气体中两气体体积比为（）

A. 1:2

B. 1:3

C. 1:4

D. 1:5

14．CuO和Cu2O的混合物中含Cu 88% ，则混合物中含CuO和Cu2O的物质的量之比为（）

A. 1:5

B. 3:2

C. 1:4

D. 5:1

15．KCl和KBr组成的混合物3.87g溶于水配成溶液。向溶液中加入足量的AgNO3，得到干燥沉淀6.63g，则混合物中钾元素的质量分数为（）

A. 50%

B. 60%

C. 40.3%

D. 30%

16．在标准状况下，11.2LCO和CO2混合气体质量为20.4g，求混合气体中CO和CO2的体积比和质量比？

17．将0．65g锌加到50mL 1 mol·L—1盐酸中，计算：

(1)标准状况下，生成H2的体积。

(2)若反应完成后，溶液体积仍为50mL，这时溶液中的Zn2+和H+的物质的量浓度是多少?

18．18.4gNaOH和NaHCO3固体混合物，在密闭容器中加热到250℃经充分反应后，排出气体冷却，称得剩余固体质量为16.6g，计算混合物中NaOH的质量分数?

19．有一在空气里暴露过的NaOH固体，经分析知其含水7.65%，含Na2CO34.32%，其余是NaOH。若将1g该样品放入含有HCl 3.65%的盐酸中使其完全反应后，残酸再用50g2%的NaOH溶液恰好中和完全。蒸发所得溶液至干，计算所得固体质量是多少克？

20．现有Na2CO3、NaHCO3、Na2O混合物0.5mol，加热至质量不变，产生的CO2气体全部被Na2O吸收。向剩余物质中加入一定量2mol/L的HCl溶液，恰好完全反应，生成CO26.72L（标况下），反应后向溶液中加入2mol/L AgNO3 400mL恰好完全反应，求：原混合物中三组分物质的量各是多少g？

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第一册英语上综合测试卷等级________ 一：（1）在四线格中写出字母H到T的大小写形式。（2）在四线格中写出5个元音字母的大小写式。三：找出下列句子的语用线连起来。 How many? Good afternoon. Ms Li. How are you ? Four. What's your name ? I'm Mingming. Hello. I'm fine, thank you. Goodbye. Good morning. I'm Mr Wang. Good afternoon. I'm Ms Li. My name is Lili. Good morning. , I'm Mr Wang. six pens. What's your name? Hi. How many pens? Bye-bye. 四：用单词的序号在横线上排成一个句子，注意标点符号。①Jenny ②I'm ①you ②are ③How ①fine ②I'm ①name ②your ③What's ①yellow ②It's ①It's ②blue ③a ④eraser ①red ②chair ③It's ④a 五：把下列句子翻译成汉语。（1）It's red ,blue,yellow and green. (2) How many colours ? (3) It's a blue desk. (4) How many pencils do you have ? (5) I have two eyes . 七：把下列句子翻译成汉语。 ②I have a head . ②My name is Pingping. ③The desk is yellow. ④I'm Danny. ⑤How are you ? I'm fine, thank you .