the other substance D. others substance 相关知识点: 试题来源: 解析 B substance作“物质”讲时是可数名词。句意:一种物质假如没有和其他的物质混合,它确实是一种纯的物质。依照语境可知,那个地点的“物质”应该是泛指而不是特指。因此,A、C两个选项都不对。而D项的表达本身确实是错误的。
A. the other substances B. other substances C. the other substance D. others substance 相关知识点: 试题来源: 解析 B substance作“物质”讲时是可数名词。句意:一种物质如果没有和其他的物质混合,它就是一种纯的物质。根据语境可知,这里的“物质”应该是泛指而不是特指。所以,A、C两个选项都不对。
aIdentification of the product 产品的证明[translate] aproduct Identification 产品识别[translate] ain case of pure product or substance, it is the mere chemical denomination of the commercialized product. 在纯净的产品或物质的情况下,它是商业化的产品的仅仅化工衡量单位。[translate]...
Which is a pure substance? (a) Element (b) Compound (c) Mixture (d) Both (a) and (b). Matter: Anything that has mass and occupies a certain amount of space can be called a matter. Classifying matter is essential to correctly attribute the properties, both phys...
Is water classified as a pure substance (element or compound) or a mixture? Explain. Is lead metal classified as a pure substance (element or compound) or a mixture? Explain. Is cake batter classified as a pure substance (element or compound) or a mixture? Explain. Is sodi...
更新1: 1. element 2. pound 3. homogeneous 4. heterogeneous which one?更新2: wt if...the salt is filtered from beach sand...is the salt still pure substance?a pure substance pound Salt is a chemical pound formed by replacing all or part of the hydrogen ions of an aci...
• Compound- A substance composed of two or more elements that are chemically bonded to form a new substance with different properties. • Example 1- Water. Water’s chemical formula is H2O. • Mixture- a combination of substances in which ...
5 A pure solid substance is heated into a liquid from 30 C to 90 C. The substance has a melting point of 60 C. The heating curve of the substance on the temperature-time graph is shown in Fig. 5.1.temperature /C90+80+70+×Y60+50+40+30time / min Fig. 5.1(a) Describe the dif...
unique appearance in Descartes' texts and giving rise to a range of contested interpretations is the phrase substantia pura as it is applied to mens humana in contrast to corpus humanum in the Synopsis: "the human mind is not made up of any accidents in this way, but is a pure substance...
The main classifications of matter include the categories element and compound, either of which may also be called a substance (which is a less specific term), and mixture, of which there are also many sub-categories.Definition of a (Chemical) Mixture:...