When iron rusts, it 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 A。解析:铁生锈是化学反应,生成了新物质铁锈。选项 B 物理变化没有新物质生成,不符合。选项 C 电反应与题目无关。选项 D 生物变化不符合铁生锈...
Is iron rusting a chemical or physical change? A) Chemical B) Physical C) Both A and B D) None of the above When iron rusts in the presence of oxygen and water, which of the following is occurring? a) Physical property b) Chemical property c) Physical change d) Chemic...
Chemical Change 2. A nail rusts. Physical Change Chemical Change 3. A glass breaks. Physical Change Chemical Change 4. A piece of paper burns. Physical Change Chemical Change 5. Iron and sulfur mix and form a partially magnetic black and yellow mixture. Physical Change Chemical Change...
Is this a physical change or a chemical change? Is water changing to ice is considered a physical or chemical change? Is iron rusting a physical or chemical change? Is dissolving sugar in water a physical change or a chemical change? Explain. Explain why a sample of an element havi...
Some chemical change examples include a piece of paper burning, a nail rusting, or baking a cake. Like physical changes, it's pretty clear that the way these things start and end are quite different: a shiny nail turns orange with rust, and wet dough becomes a delicious dessert. The reas...
Energy is released and we get heat to build up pressure in the engine's cylinders or heat to cook our food. A chemical change is desired in this situation because that's what will produce heat. Chemical Change Not Desired: Food and Medicine Expiration dates Why do food and medicine have ...
Although at first intended to perfect a gun, this metal went on to change the world for ever. Throughout time, metallurgists-individuals who study the physical and chemical aspect of metal were stuck on the problem of rusting. Ironically the discovery of stainless steel came in form of a ...
It is determined by the arrangement of unpaired electrons in a mineral’s atomic structure. The presence of elements like iron (Fe), nickel (Ni), and cobalt (Co) usually leads to magnetic behavior. To test observe it a small hand magnet is placed near the mineral to observe attraction or...
For instance, oxidation is a process by which oxygen in the air reacts to chemicals in the rock. Iron in rocks can react with oxygen to form iron oxide, or rust. Rust is weaker than iron and makes the rock more likely to degrade. ...
Question: Differentiate between chemical and physical properties and changes. Property of Matter: The matter has mass and occupies volume. There are two types of property of matter, these are chemical property and physical property. Properties are a measurable quantity of matter. ...