В порции поваренной соли NaCl суммарное число атомов всех элементов равно 30,1⋅1023. Вычисли химическое количество поваренной соли. Вычисляй с точностью до сотых. В ответе запиши число. Например: 2,55.
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к какому классу пренадлежат вещества NO,A1L2V3,Cu2O,PbO,CO,Mn2O7,CO2,HMnO4,ZnCO3,BaO,Mn(OH)2,Fe(OH)3,HNo3,KCe
Our History in 2006 Jasper Electronics Co., Ltd. was set up as an independent marketing division; in 2008 Fuming was acquired by Jasper Electronics Co., Ltd. Almost every process of production has been fully-automated, eg silk printing, die-cutting, drying, position-hole punching, and pin-cramping. in 2014 Jasper Electronics moved to new site, Shajing town, Shenzhen. With 1250 square meters, over 10-year engineering team and state-of-art facilities, we are in better position to serving our customers’ need now. Our Factory Jasper Electronics Co., Ltd., is specialized in human interface products development and manufacturing, primarily membrane switch, flexible circuit, rubber keypad and keypad assemblies. We also offer outsourcing services that are vertically integrated with components capabilities to optimize our OEM customer's operations and time to market. Our specific experience and competence lies in the manufacture of screen printing, die set and assembly technology. On the basis of these technologies, Jasper has concentrated efforts on four business fields: membrane switch, flexible circuit, rubber keypad and keypad assembly. At Jasper, we believe quality is key to business growth. We have a stringent QC program in place, which keeps our product defect ratio low at less than 5 percent. We are committed to providing the one-time perfect quality and value-added services. Great vision, continuous innovation, business operation and team-work spirit, has constituted our organization culture and motivated Jasper people to create the true value for the clienteles. Our Product JASPER Products includes the following: 1, membrane switches 2, membrane panel 3, rubber products 4, Flexible Circuits We supply membrane switches all over the globe to a wide range of companies worldwide, ranging from large multinational organizations to small individual companies. Product Application Home Appliances Consumer/Industrial Electronics Mobile Phone/UMPC Toy Security Control System Automotive Industrial Automation Medical and Scientific Instrumentation Network Products Our Certificate We always feel that all success of our company is directly related to the quality of the products we offer. They meet the highest quality requirements as stipulated in ISO9001-2008, SGS guidelines and our stringent quality control system. 3 semi-automatic printers; 2 stamping presses; 1 hydraulic’s; 1 heat embossing machines; 1 CCD hole punching machine, 2 mechanic’s; 1 ball-screw type laser-cutting machine 1 film-laminating machine 2 laser-cutting machines; 2 ovens; 1 UV-curing machine; 1 Film-exposure machine; 1 frame-drying machine 2 keypad functionability testers; 1 fully-automatic pin-cramping machines etc. Production Market We have customers in the domestic market and foreign markets. Jason Hu sales manager can speak fluent English for good communication. Our main sales market: Nationalwide; Japan; East Asia; South America; the Middle East;Eastern Europe; Major customers: home appliances; medical; automotive; machinery and equipment; consumer electronics; instruments and meter,and so on. Cooperation customers: Gree; Foxconn; ZTE; Reliance; Tata Indicom; GE; TCL; Sanmina-sci Etc. Our service Jasper Electronics provides design engineering and manufacturing services that are vertically integrated with components capabilities to optimize its OEM customer's operations and time to market. Jasper establishes long-term customer partnership by delivering the human interface solution available, primarily membrane switch, EL lamp, circuit board, rubber keypad, plastics moulding, touch panel and electronics assemblies. Our aim is to achieve customer satisfaction through excellence in design, supply chain management, manufacturing and repair solutions. Through our culture, our drive and the expertise of each individual employee, we are uniquely positioned to provide best-in-class services to a global customer base.China touch panel website:http://www.bestmembraneswitchs.com/
N-Ethyl-2-pyrrolidone is one kind of strong polar organic solvent. Has the high chemical stability, the weak basicity, the high dissolving power, lowly steams characteristic and so on steam pressure and low coefficient of dielectrical loss. N-Ethyl-2-pyrrolidone NEP Product nameNEP(N-Ethyl-2-pyrrolidone) CAS No.2687-91-4 UN No. ENS No.220-250-6 SpecificationsPurity(%)99.5%min Water Content0.1%max Color(Pt-Co)30max GBL0.1%max Amine(GC)0.3% max Density g/ml0.990-0.999 Refractivity N20d1.4660-1.4670 Use / ApplicationIndustry Class: Uses in to produce the pyrrolidone series product, the oil quality purifies, the gunpowder, the coating, the dye, the heat-resisting macromolecular weight polymerization resin as well as does the rubber degreasing, the light sends the anti- etching reagent to strip the medicinal preparation, the coating launches the medicinal preparation, epoxy side excises, the acetylene, the pyprolylene extract, the natural gas desulphurization, synthetic fiber spinning medium, pigment disperser and so on. ●Reagent Class: Uses in the medicine, the agricultural chemicals intermediate and the everyday use cosmetics profession, as well as produces profession and so on high tech attachment value high lithiumbattery. Packingin 200kg galvanized iron or plastic drum, 20’fcl=80drums=16mtFuran website:http://www.chinafuran.com/furan/
13) Сплошной шар диаметром 20 см и массой 35 кг вращается вокруг непод-вижной оси, проходящей через его центр, с частотой 5 об/с. На шар подействовал постоянный вращающий момент, вследствие чего шар сделал 200 об за 15 с. Найти величину вращающего момента.
объясните прошу материал 8 класса
там крч ног, степени окисления и тд
блиин я вообще химию не понимаю -_-