1. Put the gas to be studied in a glass bottle and pour some water into it. This gas will not dissolve.
2, put the burning candle into the gas, and the candle actually shines brightly.
Put a mouse in a bottle full of this gas. The mouse is alive and comfortable. He suspects that people may feel better after inhaling.
Use a glass tube to suck oxygen from a big bottle into your lungs and write down your feelings: "I feel very happy. My lungs feel like breathing air as usual, without any discomfort.
Extended data
Oxygen is more active chemically. Except rare gases and metal elements with low activity such as gold, platinum and silver, most elements can react with oxygen. These reactions are called oxidation reactions, and the compounds produced by the reactions are called oxides.
Generally speaking, aqueous solutions of nonmetallic oxides are acidic, while alkali metal or alkaline earth metal oxides are alkaline. In addition, almost all organic compounds can be violently burned in oxygen to produce carbon dioxide and water.
In chemistry, the chemical reaction between substances and oxygen is defined as oxidation reaction, and redox reaction refers to the reaction of electron transfer or deviation. Oxygen has combustion-supporting and oxidizing properties.
Oxygen generator is suitable for oxygen therapy and health care people;
1. People vulnerable to hypoxia: middle-aged and elderly people, pregnant women, students who have been engaged in mental work for a long time, company employees, government officials, etc.
2. High altitude hypoxia: high altitude pulmonary edema, acute altitude sickness, chronic altitude sickness, high altitude coma, high altitude hypoxia, etc. ;
3. People with poor immunity, heatstroke, gas poisoning and drug poisoning. ;
4, in a state of high metabolism, such as fever, convulsions, hyperthyroidism and the use of thyroxine and insulin;
5. Use adrenocorticotropic hormone, adrenocortical hormone, epinephrine, norepinephrine, etc.
6. lack of vitamins e and c and trace element selenium (poor ability to scavenge excessive free radicals and poor antioxidant capacity);
7. irradiated by x-rays;
8. People who have participated in strenuous exercise or overwork and have insufficient oxygen supply;
9. In poorly ventilated public places (such as cinemas, gyms, computer rooms, casinos, etc.). ), people are mixed and the air is dirty;
10, closed cars, air-conditioned rooms, underground shopping malls, air defense facilities, and underground military command places;
1 1, mental workers who are nervous about work and study, junior and senior high school students and other people preparing for the exam.
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