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1、初三化学化学式计算题练习题temporary electricity security construction organization design; large mechanical of loaded, and split construction programme; labour protection technology measures requirements, and plans; dangerous parts and way process, especially construction risk degree larger project should for te
2、chnology argument, take corresponding of security technology measures; on special process and the new process, and equipment, and facilities, and material of using, should targeted of special security requirements and operation provides; Divide key positions in a construction site fire and flammabil
3、ity, fire equipment and facility configurations, welding approval, fire inspection, duty Firemans activities, must devise appropriate systems and measures should also have safety signs at construction site layout master plan. These types of technical measures and requirements subject to the superior
4、 technical Department for approval, Chief supervision engineer to review implementation. In order to ensure the implementation of safety measures, should be organized to staff resources for implementation. Note: before the project began, head of engineering to engineering, construction, safety techn
5、ical measures to ensure responsible foreman detailed low-down; foreman responsibility according to the technical managers cards on the table for the Division in charge of the foreman gives the low-down. ? safe disclosure by the General, heads of sub and security responsibility of people to participa
6、te in, the two sides signed. Total disclosure must be in for supplementary cards on construction feature of the project. ? the type operators for safe operation of the sub-item project technology gives the low-down, branches, can refer to industry standard of safety management model (the Guide to st
7、andardization in Chengdu city construction site to create). ? foremen on construction jobs in the process of releasing production tasks at the same time, the need for security disclosure. ? production assurance system approval requirements in accordance with fire safety provisions of that document.
8、Scaffolding safety technology to give the low-down on 4-2 construction organization name project name construction Note: before the project began, head of engineering to engineering, construction, safety technical measures to ensure responsible foreman detailed low-down; foreman responsibility accor
9、ding to the technical managers cards on the table for the Division in charge of the foreman gives the low-down. ? safe disclosure by the General, heads of sub and security responsibility of people to participate in, the two sides signed. Total disclosure must be in for supplementary cards on constru
10、ction feature of the project. ? the type operators for safe operation of the sub-item project technology gives the low-down, branches, can refer to industry standard of safety management model (the Guide to standardization in Chengdu city construction site根据化学式计算 基础知识: ?相对分子质量,分子中含有各原子的原子质量(原子个数相对原子
11、质量)之和; ?元素质量比=元素的质量分数比,原子个数比相对原子质量比; ?元素的质量分数,该元素的相对原子质量原子个数?相对分子质量。 考查题型: ?计算分子中各元素的原子个数比 ?计算分子的相对分子质量 ?计算分子中各元素的质量比 ?计算分子中某元素的质量分数 ?给出物质质量，计算含某元素的质量 一、基础练笔: 1(计算下列化学式的相对分子质量 (1)氧气(O2) (2)水(H2O) (3)氧化铜(CuO) (4)氧化铁(Fe2O3) (5)氯酸钠(NaClO3) (6)硝酸(HNO3) (7)二个五氧化二磷 (8)硫酸铁,Fe2(SO4)3,; (9)胆矾,CuSO4?5H2O,。 (1
12、0)(某元素R的氧化物RxOy，相对分子质量为M，则R元素的相对原子质量是多少, 2、计算分子中各元素的质量比 (1)污染的融雪剂的主要成份是醋酸钾(CH3COOK)。请回答:醋酸钾中C、H、O元素的质量比; (2)从大麻叶中提取的一种毒品，叫大麻酚，它的化学式为CHO在空气中焚烧生成二氧化碳和水。 21262 (a)则该物质的相对分子质量; temporary electricity security construction organization design; large mechanical of loaded, and split construction programme;
13、labour protection technology measures requirements, and plans; dangerous parts and way process, especially construction risk degree larger project should for technology argument, take corresponding of security technology measures; on special process and the new process, and equipment, and facilities
14、, and material of using, should targeted of special security requirements and operation provides; Divide key positions in a construction site fire and flammability, fire equipment and facility configurations, welding approval, fire inspection, duty Firemans activities, must devise appropriate system
15、s and measures should also have safety signs at construction site layout master plan. These types of technical measures and requirements subject to the superior technical Department for approval, Chief supervision engineer to review implementation. In order to ensure the implementation of safety mea
16、sures, should be organized to staff resources for implementation. Note: before the project began, head of engineering to engineering, construction, safety technical measures to ensure responsible foreman detailed low-down; foreman responsibility according to the technical managers cards on the table
17、 for the Division in charge of the foreman gives the low-down. ? safe disclosure by the General, heads of sub and security responsibility of people to participate in, the two sides signed. Total disclosure must be in for supplementary cards on construction feature of the project. ? the type operator
18、s for safe operation of the sub-item project technology gives the low-down, branches, can refer to industry standard of safety management model (the Guide to standardization in Chengdu city construction site to create). ? foremen on construction jobs in the process of releasing production tasks at t
19、he same time, the need for security disclosure. ? production assurance system approval requirements in accordance with fire safety provisions of that document. Scaffolding safety technology to give the low-down on 4-2 construction organization name project name construction Note: before the project
20、began, head of engineering to engineering, construction, safety technical measures to ensure responsible foreman detailed low-down; foreman responsibility according to the technical managers cards on the table for the Division in charge of the foreman gives the low-down. ? safe disclosure by the Gen
21、eral, heads of sub and security responsibility of people to participate in, the two sides signed. Total disclosure must be in for supplementary cards on construction feature of the project. ? the type operators for safe operation of the sub-item project technology gives the low-down, branches, can r
22、efer to industry standard of safety management model (the Guide to standardization in Chengdu city construction sitetemporary electricity security construction organization design; large mechanical of loaded, and split construction programme; labour protection technology measures requirements, and p
23、lans; dangerous parts and way process, especially construction risk degree larger project should for technology argument, take corresponding of security technology measures; on special process and the new process, and equipment, and facilities, and material of using, should targeted of special secur
24、ity requirements and operation provides; Divide key positions in a construction site fire and flammability, fire equipment and facility configurations, welding approval, fire inspection, duty Firemans activities, must devise appropriate systems and measures should also have safety signs at construct
25、ion site layout master plan. These types of technical measures and requirements subject to the superior technical Department for approval, Chief supervision engineer to review implementation. In order to ensure the implementation of safety measures, should be organized to staff resources for impleme
26、ntation. Note: before the project began, head of engineering to engineering, construction, safety technical measures to ensure responsible foreman detailed low-down; foreman responsibility according to the technical managers cards on the table for the Division in charge of the foreman gives the low-
27、down. ? safe disclosure by the General, heads of sub and security responsibility of people to participate in, the two sides signed. Total disclosure must be in for supplementary cards on construction feature of the project. ? the type operators for safe operation of the sub-item project technology g
28、ives the low-down, branches, can refer to industry standard of safety management model (the Guide to standardization in Chengdu city construction site to create). ? foremen on construction jobs in the process of releasing production tasks at the same time, the need for security disclosure. ? product
29、ion assurance system approval requirements in accordance with fire safety provisions of that document. Scaffolding safety technology to give the low-down on 4-2 construction organization name project name construction Note: before the project began, head of engineering to engineering, construction,
30、safety technical measures to ensure responsible foreman detailed low-down; foreman responsibility according to the technical managers cards on the table for the Division in charge of the foreman gives the low-down. ? safe disclosure by the General, heads of sub and security responsibility of people
31、to participate in, the two sides signed. Total disclosure must be in for supplementary cards on construction feature of the project. ? the type operators for safe operation of the sub-item project technology gives the low-down, branches, can refer to industry standard of safety management model (the
32、 Guide to standardization in Chengdu city construction site(b)该物质中碳、氢、氧三种元素的质量比; (3)化肥硝酸铵的化学式为(NHNO)。试求:硝酸铵中N、H、O三种元素的质量比; 43(4)根据莽草酸的化学式(CHO)计算:莽草酸中氢元素和氧元素的质量比为; 7105(5)硫酸钾中各元素的质量比;14(计算下列化合物中元素间的质量比 (6)硫酸(H2SO4)中氢元素、硫元素、氧元素的质量比多少, (7)四氧化三铁(Fe3O4)中铁元素与氧元素的质量比多少, 3 、计算分子中某元素的质量分数 (1)计算硝酸铵(NHNO)中氮元素质
33、量分数 43(2)醋酸钾中钾元素的质量分数为(保留一位小数);(CHCOOK) 3(3)皮鞋生产中所用的胶水含有正已烷(CH)，求正已烷中碳元素的质量分数; 614(4)氯酸钾中氧元素的质量分数是多少, to create). ? foremen on construction jobs in the process of releasing production tasks at the same time, the need for security disclosure. ? production assurance system approval requirements in acc
34、ordance with fire safety provisions of that document. Scaffold safety technology gives the low-down on 4-2 construction construction construction organization name project name cards on the table before the one down the scaffolding of content security technology, team members have a clear division o
35、f labour, unified command, operation energies to concentrated, may not look around and joking, when not in the tool bag. Wear personal protective equipment correctly, foot wear soft-soled shoes. Remove pick rack and other dangerous parts hanging belts. Before dismantling scaffolding, around fences o
36、r warning signs, set up special care in transport routes and ban people entering. Strict compliance with the removal order, from the top down, step, and no upper level jobs simultaneously. ? dismantle large Rails scaffolding, bridging, you should split the middle button, then remove both ends buckle
37、, Shun down by operators in the Middle Poles shall not throw down. Dismantling scaffolding, scaffold, steel pipe, fasteners, materials should go to the pass or use the rope hanging down, throw shall not be voted down, so as to avoid injury and unnecessary losses. ? removal process is best not to cha
38、nge horses in the Middle, such as the need for person, should be removed clearly. ? best not to interrupt the process of demolition, if absolutely necessary to interrupt the dismantled parts should be clearly come to an end, and check whether it will collapse, check the security before the intermiss
39、ion. ? scaffold dismantling after the material shall be classified and piled up stacked flat, under pads well drained. Steel is best placed indoor, stacked in the outdoors should be covered. Sporadic small fasteners, bolts and other components using clean diesel box, store room for reuse. ? deformat
40、ion of steel elements should be straightened, damage repair and paint for reuse should scrap cannot be repaired. 11. auxiliary facilities: feeder channel should be set 1M high guard rail around, up and down ramps or stairs, are not allowed to climb the scaffolding up and down. Disclosure signatures
41、to accept cards deliver the signature time Japan form in duplicate, teams from the deposit of an instrument, and filed a report. Artificial Dig-hole pile project technology gives the low-down (reference tables) 4-2-1 construction organization name project name the construction site construction requ
42、irements of security technical cards on the table in accordance with the construction plan operations; Digging holes, hoisting, Dado, residue used in transportation of all equipment, facilities, safety equipment, gas masks, accessories, materials and personal protective equipment must be checked bef
43、ore use, ensure the safety of use; Every day must be in service for toxic gastemporary electricity security construction organization design; large mechanical of loaded, and split construction programme; labour protection technology measures requirements, and plans; dangerous parts and way process,
44、especially construction risk degree larger project should for technology argument, take corresponding of security technology measures; on special process and the new process, and equipment, and facilities, and material of using, should targeted of special security requirements and operation provides
45、; Divide key positions in a construction site fire and flammability, fire equipment and facility configurations, welding approval, fire inspection, duty Firemans activities, must devise appropriate systems and measures should also have safety signs at construction site layout master plan. These type
46、s of technical measures and requirements subject to the superior technical Department for approval, Chief supervision engineer to review implementation. In order to ensure the implementation of safety measures, should be organized to staff resources for implementation. Note: before the project began
47、, head of engineering to engineering, construction, safety technical measures to ensure responsible foreman detailed low-down; foreman responsibility according to the technical managers cards on the table for the Division in charge of the foreman gives the low-down. ? safe disclosure by the General,
48、 heads of sub and security responsibility of people to participate in, the two sides signed. Total disclosure must be in for supplementary cards on construction feature of the project. ? the type operators for safe operation of the sub-item project technology gives the low-down, branches, can refer
49、to industry standard of safety management model (the Guide to standardization in Chengdu city construction site to create). ? foremen on construction jobs in the process of releasing production tasks at the same time, the need for security disclosure. ? production assurance system approval requirements in accordance with fire safety provisions of that document. Scaffolding safety technology to give the low-down on 4-2 construction organization name project name construction Note: before the project