A. Calcium, magnesium, and sulfur B. Nitrogen, phosphorus, and potassium C. Iron, zinc, and copper D. Oxygen, hydrogen, and carbon 相关知识点: 试题来源: 解析 B。解析:文章中明确提到 Chemical fertilizers contain nitrogen, phosphorus, and potassium。反馈...
Talcum powder is derived from talc, a mineral comprised of silicon, magnesium and oxygen. It is mined, and frequently contaminated with asbestos, as they are often found near to each other and even mined together. For that reason talc should not be used near the nose or mouth, nor the ...
magnesium (E)-1,1,1-tris(fluoranyl)-4-oxidanylidene-pent-2-en-2-olate Canonical SMILES: CC(=O)C=C(C(F)(F)F)[O-].[Mg+2] Isomeric SMILES CC(=O)/C=C(\C(F)(F)F)/[O-].[Mg+2] InChI InChI=1S/C5H5F3O2.Mg/c1-3(9)2-4(10)5(6,7)8;/h2,10H,1H...
Aluminum has a distinctive crystal structure similar to lithium and magnesium. As a result, these metals havenon-magnetic propertiesand are also good examples of paramagnetic metals. Aluminum is known as a highly durable material that is rust-resistant. While aluminum corrosion can still happen in ...
The chemical formula for magnesium hydride is {eq}MgH_2 {/eq}. The compound is an ionic compound composed of the magnesium cation...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough homework and ...
Add small amounts of the metals magnesium, manganese, and copper and you make a superb aluminum alloy called duralumin, which is strong enough to make airplanes. Alloys always show improvements over the main metal in one or more of their important physical properties (things like strength, ...
Simply, it represents the total concentration of dissolved substances in water. The inorganic salt commonly found in TDS is categorized into (1)cations, which include calcium, magnesium, potassium, and sodium, and (2)anions,which include carbonates, nitrates, bicarbonates, chlorides, and...
Talc can be commonly found in eye shadows and face powders. Usually, this substance is made from silicon, oxygen, hydrogen, and magnesium. While talc is usually safe to use on the skin, there have been instances where huge companies have had problems purifying talc. This can be a problem,...
There is some evidence that Lexapro may be more effective and tolerable than other SSRIs, including Celexa, in the treatment of depression Celexa is not recommended for patients with pre-existing heart problems such as bradycardia or congenital long QT syndrome, low potassium or magnesium levels, ...
magnesium methoxymethoxymethylbenzene bromide - Buyers Guide for Chemicals is a directory of chemicals, chemical suppliers and producers. More than 140,000 products, 270,000 supply sources and 4,400 company addresses. Search for free and find new supplie