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。
Urine is not a pure substance. To be called a pure substance, that substance must be built with one building block. However, urine is made up of several materials that are not even bonded to each other. Urine has not one, but many building blocks and therefore, it is not a pure subst...
Is concrete classified as a pure substance (element or compound) or a mixture? Explain.Question:Is concrete classified as a pure substance (element or compound) or a mixture? Explain.Mixtures and Substances.We constantly prepare mixtures, for example, a person who washes his hands...
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...
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...
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...
What is the difference between a pure substance and a mixture? • Add this info to your notes that you took from the last section. • Compound- A substance composed of two or more elements that are chemically bonded to form a new substance with different properties. ...
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:...