When iron rusts, it is a chemical change. What happens during this process? 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 ...
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...
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As an example, consider rust formation. When rust forms, the metal iron reacts with oxygen in the air to form a new compound, iron oxide (rust). This chemical reaction may be expressed by the following unbalanced chemical equation, which may be written either using words or using the chemi...
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1. Start by writing a balanced chemical equation.2. Don't confuse thermodynamic stability with chemical reactivity.3. Forum Supports LaTexXeluc Guest Re:What is this compound(s)? Electrolysis « Reply #2 on: May 29, 2005, 09:38:23 PM » im not sure that its NaOH because this ...
Rust is another name for iron oxide, which occurs when iron or an alloy that contains iron, like steel, is exposed tooxygenand moisture for a long period of time. Over time, the oxygen combines with the metal at an atomic level, forming a new compound called an oxide and weakening the...
Water is made up of two different elements, 2 hydrogens and 1 oxygen, so H2O is a compound. Two oxygen atoms (O2) are two elements, but they are the same element, so O2 is a molecule. Iron oxide (Fe2O3), or rust, is made up of two different elements, 2 irons and 3 oxygens...
Aliphatic acrylic polyurethane is a chemical compound used as a coating in industrial and building applications. The chemical makeup of aliphatic acrylic polyurethane makes it tough and flexible, and it is added to many products to create a durable finish. Aliphatic acrylic polyurethane is most co...