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。
So, is copper a pure substance or a mixture?Yes, copper is a pure substance as copper has definite properties. It is made up of only one kind of atom. A substance having one or more atoms in the same proportion throughout the substance is a pure substance. It is a d-block metal wi...
What is the difference between a pure substance and a mixture:一种纯物质和混合物的区别是什么a,A,be,Pure,and,pure,what,the,纯物质,What 文档格式: .ppt 文档大小: 218.5K 文档页数: 11页 顶/踩数: 0/0 收藏人数: 0 评论次数: 0 文档热度: ...
Is a pure silver ring classified as an element, a compound, a homogeneous mixture, or a heterogeneous mixture? Explain. Is milk classified as a pure substance, a pure element, a homogenous mixture, or a heterogeneous mixture? A substance that can't be...
Suppose you are given a sample of a homogeneous liquid. What would you do to determine whether it is a solution or a pure substance?Liquid mixturesThe homogenous liquid mixture is characterized by the presence of an equal quantity of th...
Mixtures, on the other hand, are considered impure substances. A mixture is created when substances combine but no chemical reaction occurs. In general, a mixture can be separated into its original components, while a pure compound cannot. ...
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Compound is a pure substance. 08:03 Give one important feature of an element. 01:11 Why is water a compound? 01:22 What type of mixture is formed when lime juice is mixed in water? 02:54 Name the method by which rice can be separated from its husk. 01:59 Give an example of a ...
,Dl°C A pure solid sample of Substancexis put into an evacuated flask. The flask is heated at a steady rate and the temperature recorded as time passes. Here is a graph of the results: temperature Use this graph to answer the followi...