pyridine, 3-bromo-6-chloro-2-fluoro-

The genus of 3 tons of mercury, 6 tons of xenon, and 2 tons of hydrogen have different physical properties.
Mercury, at room temperature, is a liquid metal, shimmering with silver light, heavy and good fluidity. Its density is quite high, about 13.59 grams/cubic centimeter, which makes it feel sinking to the touch. The melting point of mercury is very low, -38.87 ° C, and the boiling point is only 356.6 ° C. Mercury has good electrical conductivity, but its volatility should not be underestimated. It can evaporate slowly in the air, and mercury vapor is toxic. If inhaled inadvertently, it is very harmful.
Xenon is one of the rare gases, colorless and odorless. Its density is greater than that of air, about 5.8971 grams/liter. The chemical properties of xenon are relatively stable, and it is difficult to react with other substances under normal conditions. However, under specific conditions, many compounds can be formed. Xenon has a high luminous efficiency and is widely used in the field of lighting, such as xenon lamps, which emit bright light and are energy-saving and efficient.
Hydrogen is the lightest element in the universe, with a very small density, only 0.0899 g/l, which is much lighter than air. Hydrogen is extremely difficult to dissolve in water. It is gaseous at room temperature and pressure, and is colorless and odorless. Hydrogen is highly flammable. When mixed with oxygen, it can easily cause violent explosions when exposed to open flames or hot topics. The combustion product is only water, which is clean and pollution-free. At the same time, the reducing property of hydrogen is also significant, and it is often used as a reducing agent in metallurgy and other fields.
These three have their own unique physical properties and can be used in different fields to demonstrate the wonders of creation.

The chemical properties of three rivers, six seas, and two oceans are different.
Rivers, the water flow mostly originates from mountains and rivers and converges. The nature of river water is always clear and light, because the flow passes through, it dissolves mineral substances, but the amount is small. Its pH value is more close to neutral, about 6.5 to 8.5. The water contains ions, such as calcium, magnesium, sodium, potassium, etc., but the concentration is not high. And the river flow rate is slow or rapid, which has a huge impact on the shaping of the coastal landform, transporting sediment and nourishing the fields on both sides.
The sea is vast. The salty taste of seawater is mainly due to the large amount of sodium chloride, with a salinity of about 3.5%. In addition to chlorine and sodium, it also contains magnesium, sulfur, calcium and many other elements. The pH of seawater is about 8.1 to 8.3, which is weakly alkaline. The depth of the sea is different, and the water temperature and salinity are also different. The water temperature in the depths is low and the pressure is high. Ocean circulation plays a significant role in global climate regulation, and warm and cold ocean currents affect the coastal climate.
Oceans are converged by the vastness of the sea. Its chemical properties are similar to those of the ocean, but the scale is larger. The ocean surface is vast and less affected by the atmosphere and land than the sea. The salinity of ocean water is also about 3.5%, and the temperature varies significantly with the depth. The upper layer is warm due to sunshine, and the depths are cold. Oceans are biodiverse and their ecosystems are complex, which are closely related to biogeochemical cycles such as the global carbon cycle and nitrogen cycle.
Although rivers, seas, and oceans are all converged by water, their environments and interactions with foreign objects are different, and their chemical properties have their own characteristics, which play unique roles in many aspects such as earth ecology and climate.

"Tiangong Kaiwu" records that the main use of 3 catties of mirabilite, 3 catties of alum, and 3 catties of coal is in the salt making process. Mirabilite plays a crucial role in the salt making process. It can remove impurities contained in the brine, make the brine more pure, and then improve the quality of the salt made. For example, if there are some impurities in the brine that affect the color and taste of the salt, mirabilite can react with it to precipitate or separate it in other forms, thus ensuring the purity of the salt.
Alum also plays an indispensable role in this process. It can help the brine to crystallize better. When the brine is at a certain temperature and concentration, alum can promote the salt in the brine to be arranged and combined in a more orderly manner, accelerate the crystallization process, and allow the salt to precipitate in a more regular and easier-to-collect form. Just like in some traditional salt making workshops, after adding an appropriate amount of alum, the crystallization effect of the salt is significantly improved, and the resulting salt particles are uniform and of high quality.
Coal is mainly used as a heat source. In the salt making process, whether it is heating the brine to evaporate water, or maintaining a suitable temperature environment to facilitate the crystallization of the salt, it is inseparable from the heat provided by coal. By burning coal, a continuous and stable heat energy is generated, so that the brine undergoes corresponding physical and chemical changes according to the process requirements of salt making, and finally is converted into a usable salt product. These three substances cooperate with each other and play a key role in the traditional process of salt production, jointly contributing to the production of high-quality salt products.

If you want to make alloys of 3, 6 baht, and 2%, there are three methods.
First, you can take a number of pure gold first, and measure it with a scale, accurate to baht and 2%. Then add other metals, such as silver and copper, one after another in the ratio of 3, 6 baht, and 2%, and mix and smelt. When smelting, it needs to be calcined with a fierce fire, so that the metals are fully fused, so that there is no appearance of segregation. After it is uniformly fused, pour it into a special mold, cool and form, and the desired alloy can be obtained.
Second, you can mix a variety of metals in approximate proportions first, and then put them in a large furnace for smelting. When smelting, closely observe the change of heat and metal. Use the ancient wind box to make the fire fierce. When the metal is all melted into a liquid state, scoop a little with a long spoon, depending on its color and fluidity, to test the degree of fusion. If the requirements are not met, increase or decrease the proportion of the metal in time, and then smelt it until it meets the alloy standards of 3, 6 baht, and 2% before casting.
Third, if there are utensils made by predecessors with similar alloys, their composition can be analyzed first. By grinding, take a little powder from the utensils, and use chemical methods to identify the types and proportions of metals in them. Then use this as a reference, according to the numbers of 3, 6 baht, and 2%, prepare the metal raw materials and put them into the furnace for smelting. This process also requires attention to the heat and time to ensure that the alloy has uniform texture and good performance, and finally the desired alloy is cast.

It is necessary to pay attention to the three canals, six canals, and two harbors.
First of all, it is necessary to prevent moisture. In such places, there is a lot of water, and the water vapor is diffused. If the hidden things are not resistant to moisture, they are easy to cause corrosion and decay. If they are hidden, they will be damp and moldy, and the materials will be difficult to meet. Therefore, if they are hidden, they should be made of solid and moisture-proof materials, and it is convenient to be good, so that the water can be dispersed.
Second time, the prevention of leakage should not be ignored. If the liquid is stuck here, such as oil, wine, etc., the density of pipelines and containers is very important. Once there is a leak, not only will things be lost, but also the surrounding water and soil will be contaminated, which will cause serious trouble. Therefore, before the accident, it is necessary to check the integrity of the equipment, and pay attention to the safety of the water.
Furthermore, fire prevention is also impossible. There are many boats here, and there may be flammable things. In case of an open fire, it will immediately start a prairie fire, and it will become a huge one. In the middle of the place, there is no fire, and the fire-fighting equipment is fully equipped. People are also familiar with the method of fire protection.
There is also a safety precaution. Because of the water, people are in the water, and it is easy to grow in the water. Therefore, the shore, it is appropriate to fix the water, and those who work hard must have safety equipment. And the boat shuttles in the port, and the navigation order also needs to be adjusted to prevent collisions.

It is necessary to hide it in the 3rd, 6th, and 2nd harbors. Moisture-proof, leak-proof, fire-proof, and safety prevention all need to be carefully waited for, so as not to slack off, in order to ensure its benefits and harm.