We all realize that oxygen is a dangerous friend. Oxygen is something that we cannot live without, but it is also a substance that we cannot live with indefinately. This chapter will review two aspects of this
Combustion is a chemical process that occurs when a substance reacts with oxygen to produce heat and light. There are three essential conditions for combustion to take place. First, there must be a fuel. Fuels can be solids, liquids, or gases. For example, wood, gasoline, and natural gas...
Combustion is a chemical process that occurs when a substance reacts with oxygen to produce heat and light. There are three essential conditions for combustion to take place. First, there must be a fuel. Fuels can be solid, liquid, or gas. For example, wood, gasoline, and natural gas are...
Oxygen is a kind of simple substance formed by oxygen element, chemical formula O2, its chemical properties are more active, and can react with oxygen with most elements. It is not very active at room temperature, and it is not easy to interact with many substances. However, it is very ...
Is argon a pure substance?Classification of Matter:Matter can be classified as either a mixture of a pure substance. A pure substance contains only one type of molecule or atoms. In contrast, a mixture contains multiple types of atoms and/or molecules....
The main classifications of matter include the categories element and compound, either of which may also be called a substance (which is a less specific term), and mixture, of which there are also many sub-categories.Definition of a (Chemical) Mixture:...
水是我们生活中必不可少的一种物质,其重要性仅次于氧。(substance, next to) Water is a substance essential to our life, and comes next only to oxygen in importance.相关知识点: 试题来源: 解析 答案:Water is a substance essential to our life, and comes next only to oxygen in importance....
百度试题 结果1 题目③ Oxygen is the basic substance to maintain life(维持生命)and to keep the func-tions of organs. 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
a) Carbon b) Hydrogen c) Oxygen d) Nitrogen e) Chlorine f) Sulfur g) Phosphorus What is the formula of nitrogen gas? Which is a substance that is made up of only one type of atom? What chemical element has 35 protons and 36 electrons? The atomic number of carbon is 6. What is...
To determine in which of the given reactions oxygen acts as an oxidant, we need to analyze the oxidation states of the elements involved in each reaction. An oxidant (or oxidizing agent) is a substance that causes another substance to be oxidized, which means it itself is reduced (gains ...