A. Wax turns into water B. Wax combines with oxygen to form carbon dioxide and water C. Wax turns into hydrogen gas D. Wax turns into oxygen gas 相关知识点: 试题来源: 解析 B。解析:蜡烛燃烧时,蜡与氧气发生化学反应,生成二氧化碳和水,这是蜡烛燃烧这个化学变化的本质。选项A蜡不会单纯地变成水...
结果1 题目 ( B )2. It is hard to explain in words A. what is a chemical change B. what a chemical change is C. how is a chemical change D. how a chemical change is 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
asimile 相似 [translate] athose set forth below 下面被指出的那些 [translate] aspained spained [translate] aThe best title for this passage is 19th-Century Family . 正在翻译,请等待... [translate] aIt is hard to explain what is a chemical change 解释是坚硬的什么是化学变化 [translate] ...
Some can have strong reactions with other elements. Such interactions can change the elements.Answer and Explanation: A chemical change refers to a change in the arrangement of atoms and, ultimately, structure and characteristics of an element. When elements undergo......
Is responsible to coordinate decorates between the company and the neighborhood relations, assists the second party to complete work and so on scene security, fire prevention, garbage disposal.[translate] aIt is hard to explain what a chemical change is 解释是坚硬的什么化学变化是[translate]...
A. The color remains the same. B. No chemical reaction occurs. C. A new substance is formed. D. The mass of iron decreases. 相关知识点: 试题来源: 解析 C。铁生锈是化学变化,在这个过程中会形成新物质。A 选项颜色会改变,错误;B 选项有化学反应发生,错误;D 选项铁生锈质量会增加,错误。反馈...
【题目】英译中几句从句!1 It is hard to explain what a chemical change is.2 It was what he said that disappointed me.3 T his young man isnt what he used to be,hehas turned over a new left.4 T he truth is that he cannot afford to buya new house.5 I hold the view that no ...
Chemical and Physical Properties of Matter Chemical properties are properties that describe how matter interacts with each other Physical properties describes the material which composes the matter Physical Properties Density- how much matter is packed into a given volume Malleability- the ability to be...
Izquierdo, MerceSolsona, N. What is conserved in a chemical change? Opinions of secondary school pupils. in Proceedings of the Third International Seminar on Misconceptions and Educational Strategies in Science and Mathematics. 1993. Ithaca, New York: Cornell University....
There are many possible definitions ofmatter. In science, matter is the term for any type of material. Matter is anything that has mass and takes up space. At a minimum, matter requires at least one subatomic particle, although most matter consists of atoms. The wordmatteris sometimes used ...