百度试题 结果1 题目Chemical changes often involve a change in ___. A. color B. size C. shape D. weight 相关知识点: 试题来源: 解析 A。化学变化通常会涉及颜色的变化,而大小、形状和重量一般在物理变化中可能改变更多。反馈 收藏
c. an ice cube melting in a drink, a change of s Choose a chemical substance, and give an example of a chemical change that might take place to the substance. Consider the burning of gasoline and the evaporation of gasoline. Which process represents a chemical change and which...
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....
解析 substance【答案】substance【核心短语/词汇】substance:物质【翻译】在化学变化中,总是有新的物质形成。【解析】根据题干要求,本题需要表达“在化学变化中,总是有新的物质形成”这一语义。“物质”的英文是“substance”,根据句意,这里用单数。因此本题答案是“substance”。
Free Essay: Chemical change is when one substance touches another substance a reaction which is not able to be reversed back to the original state. One way...
题目A chemical change results in the formation of new ___. A. substances B. states C. shapes D. colors 相关知识点: 试题来源: 解析 A。化学变化会形成新的物质,“substances”是物质,“states”是状态,“shapes”是形状,“colors”是颜色。反馈 收藏 ...
Answer to: A change that involves the breaking and forming of bonds is called a: a) reactant change. b) chemical change. c) physical change. d)...
ENERGETICS All types of chemical reaction involve changes in energy. When energy is emitted it can take a number of forms, but the most common form is as heat energy. Heat energy is called enthalpy. Enthalpy change is represented by the symbol ∆H. In general when bonds break energy has...
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...
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 formed. A change is not a chemical change if it doesn’t form a new substance...