The boiling of water is a(n) ___. A. chemical reaction B. physical change C. electrical reaction D. biological change 相关知识点: 试题来源: 解析 B。解析:水沸腾是物理变化,只是状态改变,没有新物质生成。选项 A 化学反应会有新物质生成,不符合。选项 C 电反应与题目无关。选项 D 生物变化不符...
When we heat water, it starts to boil. This is a ___ change. A. chemical B. physical C. natural D. artificial 相关知识点: 试题来源: 解析 B。“chemical”指化学变化;“physical”指物理变化,水加热沸腾是物理变化;“natural”意为“自然的”;“artificial”意为“人工的”。所以选 B。 反馈 ...
No, boiling water is NOT a chemical reaction, but it is a physical change. When water, H2 O, is in liquid form, it can be heated to a boil. Boiling...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer...
There are two kinds of changes — chemical change and physical change. In a chemical change there is always a new substance( 物质 ) formed. Breaking up water into hydrogen( 氢气 ) and oxygen( 氧气 ) is a chemical change. In each of the chemical change at least one new substance is for...
A) Melting Iron B) Boiling alcohol C) Evaporating Water D) Burning Coal Changes in Matter: Changes in matter can be classified as either physical or chemical change. Physical changes are those that do not involve changes in the chemical composition of ...
百度试题 结果1 题目___ is a chemical change. (burn) 相关知识点: 试题来源: 解析反馈 收藏
A. In the case of B. In case C. In case of D. In event of 相关知识点: 试题来源: 解析 A in case of sth.:假使,如果;in case:以防,万一;in event of:如果,以防;三项都不符合题意。in the cause of意为“在,,过程中”。句意:在化学变化中一种新物质生成了。反馈...
___a chemical change a new kind of substance is formedA.In the case ofB.In caseC.In case ofD.In of的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大学职业搜题找答案,刷题练习的工具.一键将文档转化为在线题库手机刷题,以提高学习效率,是
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] ...
They might react to water or to heat. 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...