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 subject. First, an overview will be given of some of the points relevant to ...
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...
the substance, 3.2 g, is fully burned in sufficient oxygen to produce 4.4g carbon dioxide and 3.6 g water, which must be contained in the substanceElement. 相关知识点: 试题来源: 解析 C, H, O 1. 计算CO₂和H₂O中的C、H质量: - CO₂中C的质量:4.4g × (12/44) = 1.2g; - H...
The addition of oxygen to a substance is defined as oxidation. 5. Analyze the Options: - Option A (Oxidation): Correct, as phosphorus is gaining oxygen. - Option B (Reduction): Incorrect, as reduction involves the loss of oxygen. - Option C (Rancidity): Incorrect, as rancidity ...
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:...
However, if Earth were a little closer to the Sun, its oceans would evaporate; if it were farther from the Sun, the oceans would freeze solid. [#highlight12]Because liquid water was present, self-replicating molecules of carbon, hydrogen, and oxygen developed life early in Earth’s history...
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...
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....
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 ...
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...