3-fluoro-5-iodopyridine

"Tiangong Kaiwu" has a saying: "All lime is refined by fire. After it is finished, it will not be damaged forever if it enters the water. Hundreds of millions of boats, hundreds of millions of walls, choking gaps to prevent adultery, it must be used." Lime is used in construction works, its main uses are wide.
One is used in building materials. In the case of building walls, lime is mixed with sand, water, etc. into mortar to bond masonry. The power of lime is used between masonry and stone to closely connect, so that the wall is strong and can withstand the wind and rain of the years. Such as the ancient city wall, which has not fallen down after hundreds of years, the contribution of lime is indispensable. And lime is applied to the wall, which can be used for whitewashing, making it flat and beautiful, and can prevent moisture and weatherproof, prolonging the life of the wall. < Br >
Second, used for waterproofing projects. In the construction of boats, lime is essential. Mixtures such as lime and hemp silk are filled between the cracks of the boats to prevent river water from infiltrating. Ancient boats traveled in rivers, lakes and seas. If there is no lime caulking and waterproofing, it will be difficult to sail for a long time. In addition, in some water storage facilities, cellars and other waterproofing places, lime is also smeared to prevent water penetration.
Third, used in agricultural production. Scattering lime on farmland can adjust the pH of the soil. Some acidic soils, improved by lime, are suitable for crop growth. And lime has a certain bactericidal and insect-killing effect, which can reduce pathogens and pests in the soil and is conducive to the harvest of crops.
Fourth, used in metallurgy and other industries. In the metal smelting process, lime, as a flux, can react with impurities such as gangue in ore to generate slag, which can separate metal from impurities, improve metal purity, and help the metallurgical process proceed smoothly. In short, lime is indispensable in many fields such as construction, waterproofing, agriculture, metallurgy, etc., and it is an extraordinary thing.

The synthesis methods of 3-5-cannon are as follows:
First, it can be obtained from natural materials. In the mountains and wilderness, there are such cannon-containing stones. If you get this stone, first cut it with a giant axe, and then calcined it with charcoal fire, and then washed and lifted it many times to remove it. Only then can you get the essence of 3-5-cannon.
Second, by the method of synthesis., such as compounds containing, raw materials containing cannon, etc. In the dense cauldron, heat, degree, so that they are mutually inverse according to the law of transformation. Control the proportion of, the reverse, this process requires careful care, a little bit of mishap, work.
Third, it can also be synthesized with the help of the immortal method. Invite the immortals who are good at transforming to use the immortal power to lead, gather the heaven and earth, and integrate into the material. The immortal uses his own method to lead the immortal, so that the material can be fused into a 3-5-cannon under the wrapping. This method requires immortals to have high-level mana, and it is not available in ordinary places. It can only be implemented in the wonderland of abundance and depression.
Therefore, the method of synthesizing a 3-5-cannon has its own advantages and disadvantages, and it needs to be based on factors such as its own parts and sources.

3-D-5-D? Is the material rational? The gold is heavy and soft, blue-gray and golden. Its melting temperature is low, 327-5 degrees Celsius, which makes it easy to melt and shape in the manufacturing process.
The density of
is very large, weighing eleven to three grams per cubic centimeter, which is heavy to the touch. It has good ductility and can be rolled into thin sheets; however, its ductility is poor, so it can be drawn into a sheet.
The ductility of

is not very good. The performance of

is not good, and the performance of
,
and so on is good, and its performance is much more. This property limits its application in the industrial field, but it is not useful for some areas that require flow separation or quantity.
Furthermore, it has the ability to resist corrosion. In the air, a dense carbonate film is formed on the surface, which can prevent the further oxidation of the metal part, so it can remain stable under normal conditions. However, in case of acid, alcohol, it is still corroded by biochemical reactions.
In addition, it is toxic, and its compounds can enter the respiratory tract, digestive tract or skin, causing damage to the body, blood, digestion and other organs. Therefore, it is necessary to be careful when using water and its compounds to prevent poisoning.

3 -, 5 - nitrate has a special property.

The main factor is water, its nature is peaceful, and it is often a kind of material. Water, color and taste, with softness, can dissolve many substances. Its chemical formula is\ (H_ {2} O\), which is composed of two elements, oxygen. Water can be diversified and reversed, such as gold oxides are generated in reverse, and non-gold oxides are generated in reverse. And water can be decomposed when it is dissolved, which can be decomposed into oxygen, which can reflect the characteristics of its constituent elements.
When it comes to nitrate, it usually refers to nitric acid or saltpeter and other nitrate-containing substances. Saltpeter, the main component is nitric acid.\ (KNO_ {3}\). Its properties are active, and nitric acid is more soluble in water. Nitric acid is oxidizing, and can generate more gold and non-gold. For example, nitric acid can be reversed, generating nitric acid and nitrogen dioxide water. This reaction is strong, showing its oxidation. Dilute nitric acid can also be reversed, but it does not generate more nitric oxide. And nitric acid can be decomposed and reversed under the addition of water, generating different substances, depending on the nitric acid.
, 3-percent water with its characteristics of tolerance and multi-reaction, and 5-nitrate with its characteristics of oxidation, solubility and decomposition, each have a place in the field of chemistry, and the world's general transformation has a very important impact.

Wen Jun's question is about the price of silk of three feet and the banner of five feet in the city. However, it is not easy to know the exact price. The price of building a market often changes from time to time and varies from situation to situation.
Looking at the ancient city, the price of silk flags, or its quality, its workmanship, and its color, is also related to the supply and demand of the city. If the silk is of good quality, the weaving is delicate, the color is fresh and beautiful, the price must be high; if the banner is exquisitely painted and the materials used are of high quality, it is also worth a good price.
In a peaceful world, people's livelihood is stable, commerce and trade are smooth, and the supply of silk flags is sufficient, its price may tend to be flat. If in a prosperous year, silkworms are prosperous and silk is abundant, the price of three feet of silk may be slightly reduced; if the need for flags is constant, the price of five feet of flags will also be stable.
However, in troubled times, wars are chaotic, the business of silkworms is damaged, the production of silk is reduced, and the people need silk for quilts, the price must be raised. Although flags are not urgent for people's livelihood, if they are used for sacrifices, celebrations, etc., the times are turbulent, materials are difficult to collect, and workers are difficult, the price of five feet of flags may also rise accordingly.
Also, in different places, the price varies. Prosperous metropolis, the city is large and crowded, the demand is large and there are many competitors, and the price is always high; in remote places, the production and supply are limited, but the demand is also small, and the price may be slightly lower.
Although it is difficult to say the exact price of three feet of silk and five feet of banner, it is almost the price of the city, which follows the principle of supply and demand and the principle of quality work, and varies from time to time and place.