由原文第一段的Air is not jsut one gas. It is a mixture of different gases可知正确答案.故答案为C. (4).【答案】 A 【解析】 由原文第三段的If 1000 dots can represent the air, then 776 of them are nitrogen, 210 are oxygen, 11 are argon可知正确答案.故答案为A.反馈...
根据第一段第一行“Air is not just one gas,it is a mixture of different gases,空气不仅仅是一种气体,它是不同气体的一个混合 ”可知答案为C,空气是不同气体的一个混合;A项:空气只是一种气体;B项:空气是两或三种气体的混合,第二段第一句提到“空气中主要有四种气体”故B错误;D项:空气不存在。2、...
Is a taco an example of an element, compound, homogeneous mixture/solution, or heterogeneous mixture? Explain. Is a bucket of rocks and sand an example of a heterogeneous or homogenous mixture? Explain. Is water an element, a compound, or a mixture? Explain. What are associated colloids? Ex...
英语语法问题We have learned that air is a mixture of gases,___oxygen,water,vapor and carbon dioxide are the most important for what they do.A.whoseB.in whichC.of whichD.where答案选的是C,想问下为什么不能选D,另外介词为什么
Suggest a method to separate the constituents from the following mixture : (i) Mixture of two miscible liquids. (ii) A mixture of oil and water. (iii) A mixture of plant pigments. (iv) A mixture of ether and water. (v) A mixture of solid nemzoic acid and sodium chloride. ...
Air is not just one gas.It is a mixture of different gases.什么是空气?空气不只是一种气体。它是不同气体的混合物,可知空气是不同气体的混合物。故选C。(2)A.细节理解题。根据第三段If 1,000 dots can represent the air,then 776 of them are nitrogen,210 are oxygen,11 are argon.如果1000个...
the element 'oxygen' is part of the mixture 'air' and some of the properties of air are due to the oxygen part - but those properties are generally less strong / intense than those of pure oxygen because of the presence of the other constituents of the mixture called 'air', e.g. ...
Mixtures Definition - A mixture contains two or more elements or compounds that are not chemically combined together. To learn about Homogeneous and Heterogeneous mixtures click here.
What is a homogeneous and a heterogeneous mixture? Give one example for each. View Solution Alloys are homogeneous mixtures. Give examples View Solution Exams IIT JEE NEET UP Board Bihar Board CBSE Free Textbook Solutions KC Sinha Solutions for Maths ...
Air is a mixture of gases primarily nitrogen and oxygen essential for respiration, whereas the atmosphere is Earth's protective layer of gases, encompassing air, water vapor, and other components.