What is the chemical reaction when copper is oxidized? A. Copper + Oxygen → Copper oxide B. Copper + Hydrogen → Copper hydride C. Copper + Nitrogen → Copper nitride D. Copper + Carbon → Copper carbide 相关知识点: 试题来源: 解析 A。解析:铜氧化时,铜与氧气反应生成氧化铜,这是铜氧化...
75. What is the COD (Chemical oxygen demand) test? COD Test gives the amount of oxygen required by biological active material COD Test gives the amount of oxygen required by biological activity as well as inactive material Answer:B) COD Test gives the amount of oxygen required by biological ...
What does a subscript indicate in a chemical formula? What is the common name for this molecule? What are the classifications of chemicals? Which chemical element has the shortest name? What is the chemical formula for oxygen? What is nomenclature in organic chemistry?
What Is a Chemical and What Isn't a Chemical? By Anne Marie Helmenstine, Ph.D. Examples of chemicals include the chemical elements, such as zinc, helium, and oxygen; compounds made from elements including water, carbon dioxide, and salt; and more complex materials like your computer, air,...
the seventh element of the periodic table between carbon and oxygen is nitrogen. it’s an important part of amino acids. around eighty per cent of the earth’s atmosphere comprises nitrogen gas. it has no colour, mostly diatomic non-metal gas which is odourless and colourless in nature. ...
(a) What are the two ways for oxygen transport in the body? (b) What makes it the most efficient? Oxygen Usage in the Body Oxygen is a very important nutrient in the body that is used in aerobic respiration. It acts as the final electron acceptor in the...
In a chemical reaction, iron reacts with oxygen to form rust. What is the English name for iron? A. Copper B. Aluminum C. Iron D. Silver 相关知识点: 试题来源: 解析 C。本题考查铁的英文名称。选项 A 是铜,选项 B 是铝,选项 D 是银。只有选项 C 是铁。
百科挑战题1) What is the letter forprop in the periodic table of chemical elements(化学素周期)? A.Fe B.Zn C.Ha2) What is the best way to look up information on the interne? A. By using e-mail B. By using QQ B33) What is the material of pengl leag()? A.lime B. graphite(...
willallow youtogoforlonger,enjoyahigher standard,andsave more money? Thefollowing destinationsofferaccommodation,transportation, andfoodforless. Kyrgyzstan,$25/day Kyrgyzstanisthechoiceformosttravelers interestedintryingoutCentralAsia,and most well-suitedtotravelersofallbudgets.Foodis cheap,soisgettingaroundusin...
His buildings,forand with communities,are directly ofthose communities—intheirmaking,theirmaterials,theirprogramsandtheiruniquecharacters. ( )1.Whatcanweknowfromthesecondparagraph? A.Kérédesignedmanyschoolsasastudent. B.Kéré?sdesignsareappliedalloverAsiaandAfrica. C.Kéréisthefirstmalewinnerofthe...