A. sodium chloride B. potassium chloride C. calcium chloride D. magnesium chloride 相关知识点: 试题来源: 解析 A。食盐的主要成分是氯化钠,即 sodium chloride。选项 B 是氯化钾,选项 C 是氯化钙,选项 D 是氯化镁。所以答案是 sodium chloride。反馈...
1 Although spinach is rich in calcium, it also contains large amounts of oxalic acid, a substance that greatly impedes calcium absorption by the body. Therefore, other calcium-containing foods must be eaten either instead of or in addition to spinach if a person is to be sure of getting en...
The chemical substance that is used to make glass is ___. A. silica B. calcium carbonate C. sodium carbonate D. magnesium oxide 相关知识点: 试题来源: 解析 A。制造玻璃的化学物质是二氧化硅,即 silica。选项 B 是碳酸钙,选项 C 是碳酸钠,选项 D 是氧化镁。所以答案是 silica。反馈...
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[#paragraph1]A fluid is a substance, such as a liquid or gas, in which the component particles (usually molecules) can move past one another. Fluids flow easily and conform to the shape of their containers. The geologic processes related to the movement of fluids on a planet’s surface ...
and leads to hard water in many regions. An unusual form of calcium carbonate is ikaite with crystal water CaCO3·6H2O. Ikaite is stable only below 6 °C.参考: Me Calcium carbonate is a chemical pound with the formula CaCO3. It is a mon substance found in rocks in all ...
Is milk classified as a pure substance, a pure element, a homogenous mixture, or a heterogeneous mixture? A substance that can't be chemically broken down into simpler substances is ___. (a) a compound (b) an element (c) an electron (d) a hete...
A chemical element is a substance that is made of only one kind of atom. When reduced to a single atom of the substance, it will retain the same chemical properties as any other amount of the substance. Answer and Explanation: Learn more about this topic: ...
Semen is a complex substance created by the male reproductive organs. The fluid is made mostly of water, plasma, and mucus (a lubricating substance). It also contains 5 to 25 calories, and is made up of small amounts of essential nutrients, including: Calcium Citrate Fructose Glucose Lactic...
D-calcium pantothenate known as pantothenic acid, is a typical nutritional fortification substance of the B-complex vitamins that can participate the basic metabolism and the synthesis of fatty acids of body.