Is gasoline burning a chemical change?GasolineGasoline is a homogeneous liquid consisting of organic compounds obtained from the distillation of petroleum and sometimes, ethanol and other additives. It is used as fuel in vehicles. The United States uses just over 40% of the total gasoline used ...
How do gas laws apply to combustion reactions? Is water boiling a chemical reaction? Is distillation a chemical reaction? Is gasoline burning a chemical change? How do you write a chemical equation with no reaction? Is striking a match a chemical reaction?
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...
解析 C。解析:化学变化是产生新物质的变化。A 改变物质颜色可能是物理变化,如颜料混合。B 冰融化是物理变化,状态改变。C 燃烧木材产生新物质,是化学变化。D 压扁易拉罐是物理变化,形状改变。本题考查对化学变化概念的理解,涉及词汇有 chemical change(化学变化)、substance(物质)等。
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Recently,Rambouillet,a small historic French town,has teamed up with a company called Glowee to turn the city into a full-scale bioluminescence laboratory.The goal is to change the way in which cities use light.The company uses marine (海的) bacteria harvested from the coast o...
Chemical Change: A chemical change occurs when two or more substances are combined, atoms are rearranged, and a new substance is formed. For example, when you combine hydrogen and oxygen in the correct amounts, water results. Answer and Explanation: ...
结果1 题目 A)6. Which of the following is a chemical change(化学变化)? A. Milk turns into yogurt. B. Water drips through stones. C. Water turns into ice. D. Candles turn to wax. 相关知识点: 试题来源: 解析 答案见上 反馈 收藏 ...
A chemical change is different from a physical change because in a chemical change ___. A. the appearance changes B. the composition changes C. the size changes D. the weight changes 相关知识点: 试题来源: 解析 B。化学变化与物理变化不同在于化学变化中物质的组成发生了变化。反馈 ...
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 o...