What is the nature of oxygen that does not dissolve easily into water and is denser than air

It's physical! The properties that matter exhibit without going through chemical changes are called physical properties.

Some properties of substances, such as color, smell, taste, whether they are easy to sublimate and volatile, can be perceived by people's ears, nose, tongue, body and other senses, and some properties such as melting point, boiling point, hardness, electrical conductivity, thermal conductivity, ductility, etc., can be measured by instruments. There are also some properties that can be calculated through laboratory data, such as solubility, density, etc.

Neither the matter changed before or after the experiment. These properties are all physical.

The properties that matter exhibit when it undergoes a chemical change are called chemical properties.

Such as flammability, instability, acidity, alkaline, oxidation, reduction, and the phenomenon of reacting with certain substances. The chemical properties of a substance can be known by the method of causing a chemical reaction of a substance. For example, heating KCLO3 to melt can cause the sparkled wood strips to rekindle, indicating that KCLO3 is able to release O2 when heated to higher temperatures

Therefore, KCLO3 has the chemical property of thermal decomposition to produce O2.

Not easily soluble in water. At 0, the maximum volume of dissolved oxygen can be dissolved in 1 volume of water, and at 20 1 atm, the solubility of oxygen is volume. Chemically speaking, oxygen is insoluble in water, which is less than a volume of micro-solubility that supports the survival of countless marine organisms.

Oxygen is a kind of elemental formed by oxygen, the chemical formula O2, its chemical properties are relatively active, and most elements can react with oxygen. It is not very active at room temperature, and it is not easy to interact with many substances. However, it is very active at high temperatures and can be directly combined with a variety of elements, which is related to the electronegativity of oxygen atoms second only to fluorine.

Oxygen is a colorless and odorless gas, and it is the most common elemental form of oxygen. Melting point, boiling point -183 . Not easily soluble in water, about 30ml of oxygen is dissolved in 1L of water.

In the air, oxygen accounts for about 21%. Liquid oxygen is sky blue. Oxygenation is a blue crystal.

Oxygen is the most widely distributed in nature, covering the mass of the crust, and is the most abundant element. Oxygen is needed for the oxidation of hydrocarbons, the treatment of wastewater, rocket propellants, and the respiration of animals and humans in aviation, aerospace and diving. Animal respiration, combustion, and all oxidation processes, including the decay of organic matter, consume oxygen.

But the oxygen in the air is constantly replenished by the photosynthesis of plants. In the cutting and welding of metal. It is the mixing of pure oxygen with combustible gas (such as acetylene) to produce a flame at extremely high temperatures, which melts the metal.

Metallurgical processes are inseparable from oxygen. In order to strengthen the production of nitric acid and sulfuric acid, oxygen is also needed for the production process. Gas with a mixture of oxygen and water vapor is blown into a gas gasifier without air to obtain gas with high calorific value.

Medical gas is extremely important.

Oxygen is denser than air and is poorly soluble in water.

Because the formula amount of oxygen is 32, and the average formula amount of air is 29, the higher the formula, the greater the density, so the density of oxygen is greater than that of air. Oxygen is very soluble in water, so it is insoluble in water.

If it is easily soluble in water, it will not drown.

It is wrong that oxygen is extremely soluble in water.

Oxygen is not easily soluble in water. Dissolve 30ml of oxygen in 1 L of water at standard atmospheric pressure.

Oxygen is not difficult to dissolve in water, it is not easily soluble in water. Oxygen, chemical formula O2. Chemical formula: , colorless and odorless gas, the most common elemental form of oxygen. Melting point, boiling point -183 .

Extended information: Oxygen accounts for about 21% of the air. Liquid oxygen is sky blue. Oxygenation is a blue crystal. It is not very active at room temperature, and it is not easy to interact with many substances. However, it is very active at high temperatures and can be directly combined with a variety of elements.

The Earth's atmosphere was initially oxygen-free. The primordial atmosphere was reductive and filled with gases such as methane, ammonia, etc. The emergence of atmospheric oxygen stems from two actions, one is the photolysis of water with the participation of non-living things, and the other is the photosynthesis with the participation of living things.

The photosynthesis of living organisms has a huge impact on the atmosphere.

It causes the atmosphere to change from a reducing atmosphere to an oxidizing atmosphere. The hydrogen produced by photolysis of water can be re-oxidized into water and returned to Earth without spreading into outer space, thus preventing the loss of water from Earth. At the same time, photosynthesis also accelerates the accumulation of oxygen in the atmosphere, profoundly changing the metabolic mode and body size of species on Earth.

The oxygen content of the atmosphere rose to 35% during the Carboniferous period. The increase in oxygen levels has led to the jugification of insects that rely on osmosis for oxygen delivery. In the Carboniferous period, dragonflies with a wingspan of 2 and a half feet were presented.

Oxygen is insoluble in water (the solubility is about many points at room temperature), and although it is insoluble, it is enough for aquatic organisms to breathe. It is easier to dissolve than H2, but it is also "insoluble" and impossible to "soluble", let alone "extremely soluble". Of course, "insoluble" is also "soluble".

The difference between slightly soluble, soluble and insoluble is that it is dissolved in water.

Soluble: more than 10 grams of 100 grams of water. (10 g of gas dissolved in 100 g of water).

Soluble: more than 1 gram of 100 grams of water, less than 10 grams of 100 grams of water.

Slightly soluble: more than 100 grams of water, less than 1 gram of 100 grams of water.

Insoluble: more than 0 g of 100 g of water, less than g of 100 g of water. Belt Mausoleum.

By temperature. At a certain temperature, the mass of a solid substance that reaches saturation in 100g of solvent is the dissolved mass (solubility is determined by the solubility of a substance at 20).

1. Insoluble or insoluble: <

2. Slightly soluble: .

3. Soluble: 1g 10g.

4. Soluble: >10g.

Whether a substance is dissolved or not, and the size of its solubility depends on the nature of the substance (referring to solvents and solutes) on the one hand; On the other hand, it is also related to the external excavations such as temperature, pressure, solvent type, etc. Under the same conditions, some substances are easily soluble and others are difficult to dissolve, i.e., different substances have different solubility in the same solvent.

Oxygen is not easily soluble in water, and there is a small amount of oxygen dissolved in water, but it cannot be said that "oxygen is easily soluble in water", so the statement A is wrong Therefore, A is in line with the topic

The density of oxygen is greater than that of air, so the statement b is true and b is false;

Oxygen is a colorless and odorless gas, so the statement C is true and C is false;

Oxygen has three state changes, so the statement d is correct, and d is wrong, so choose a

ca.Oxygen is not easily soluble in water, and there is a small amount of oxygen dissolved in water, but it cannot be said that "oxygen is easily soluble in water", so the statement is correct;

b.Oxygen is slightly denser than air, so it is true;

c. Liquid oxygen is light blue, so it is wrong;

d.Oxygen is a colorless and odorless gas, so the statement is correct; Therefore, C

Under normal conditions, oxygen is a colorless, odorless gas, slightly denser than air, and oxygen is not easily soluble in water

So the answer is: there is no color; There is no smell; Slightly larger; Not easy

Under normal conditions, the physical properties of oxygen are colorless, odorless, insoluble in water, and slightly denser than air

So the answer is: big, not easy