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Water, H2OWater, like other substances, increases in volume and decreases in density when heated. Pure water has a density of kilogram cubic meters at zero degrees Celsius and kilogram cubic meters at boiling point, with a density reduction of 4%.
At normal atmospheric pressure, when water freezes, the volume suddenly increases by about 11%. When the ice melts, it suddenly decreases in size. According to scientists' observations, in an enclosed space, when water freezes, it turns into ice, and the pressure generated by the increase in volume can reach 2,500 atmospheres.
This property is of great importance to nature and industry. This is why rock fissures gradually increase as they thaw repeatedly. The buried water conveyance plastic pipe is anti-freeze damage, and generally requires a certain buried depth (greater than the depth of the permafrost layer).
The freezing temperature of the water decreases as the pressure increases. For every 130 atmospheres of pressure increase, the freezing temperature of water decreases by 1 degree Celsius. This property of water makes it possible for the deep waters of the ocean not to freeze.
The boiling point of water varies in a linear relationship with the pressure. The boiling point increases with increasing pressure.
The heat capacity of water is higher than that of other substances, except that it is smaller than that of hydrogen and aluminum. Water has less heat transfer than other liquids. Due to this property, the ice body thickens slowly when the natural water body is frozen, and even when the water surface is frozen for a long time, the depth of the river may still be liquid, and this property of water is important for underwater life.
This property of water is also meaningful for guiding irrigation, for example, winter irrigation can increase ground temperature and prevent overwintering crops from low temperature frost damage.
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What are the properties of water, you say.
Drink it every day. Liquid.
Stable. Innocuity.
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Good is like water......, has the nature of great goodness, and is not as unkind as the landlord ......
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h2o?Colorless and transparent, liquid at room temperature, non-toxic, 0 degrees to solid, 100 degrees to gas.
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Are you playing a trick on people?
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Boring, anyone who has studied chemistry knows not to read it that way.
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Wow, the big brother on the fourth floor said it so clearly, what else can I say?
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Hydrogen oxide refers to the oxide of hydrogen. One of them is dihydrogen monoxide.
i.e. the molecular composition of water. It is a product of complete oxidation of hydrogen and can also be a product of the reduction of heavy metal oxides by hydrogen. Water has stable properties, is an important solvent, and is also an important component of living organisms. The second is dihydrogen dioxide, or hydrogen peroxide.
Or hydrogen peroxide.
Introduction to Hydrogen Oxide
Hydrogen oxide, also known as hydrogen peroxide, is composed of water and another hydrogen oxide. It is a colorless and transparent liquid with strong oxidizing properties.
It will be harmful to the human body, ** and cells, and if the finger mold orange accidentally touches **, there will be stinging.
It takes at least 2-3 hours to wash it off, and the residual substances can not be left in the body, which will cause blisters.
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Dihydrogen monoxide is water.
It is an inorganic substance composed of hydrogen and oxygen, which is non-toxic and drinkable. It is a colorless and odorless transparent liquid at room temperature and pressure, which is known as the source of human life and is an important substance to maintain life. Water is one of the most common substances on Earth.
71% of the Earth's surface is covered by water. It is an important resource for the survival of all life, including inorganic chemistry and human beings, and it is also the most important component of living organisms.
The density of water is the highest (1000 kg m is often taken in approximate calculations). The density of solid water (ice) is smaller than that of liquid water, so ice can float on the water. When the water freezes, the volume increases slightly.
Physiological Significance of Dihydrogen Monoxide:
1) Water is an important component of cellular protoplasm.
2) Water acts as a solvent in the body to dissolve a variety of electrolytes.
3) Water plays a role in transporting nutrients, metabolic wastes and endocrine substances (such as hormones) in the body.
4) Water has high thermal conductivity and specific heat, which can be used as a "heat carrier" to transfer heat between the body and the surface, which helps the human body to regulate body temperature.
The above content reference:
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Diohydrogen monoxide is water, the chemical formula H2O, 2 is the descending code, because the input method does not, H stands for hydrogen, O stands for oxygen, generally this kind of oxygen is read in front, such as CO2 carbon dioxide, with a descending code is a molecule composed of several atoms, without a descending code is a kind of atom, such as water H2O molecule, which is composed of two hydrogen atoms and an oxygen atom.
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Dihydrogen oxide generally refers to water.
Water is an inorganic substance composed of two elements, hydrogen and oxygen, and is a colorless, odorless and transparent liquid at room temperature and pressure. Water is one of the most common substances in the first year, an important resource for all life, including humans, and the most important component of living organisms. Water plays an important role in the evolution of life.
Aquatic products have been known for a long time, and in ancient China and the West, water was regarded as a basic component in the simple view of matter. Water is one of the five elements in ancient China. There is also water in the ancient doctrine of the four elements.
There is a great deal of disagreement in the academic community about the origin of water, with dozens of different theories of water formation. Some people believe that in the early days of the formation of the earth, hydrogen in the primitive atmosphere was oxidized into water, and water vapor gradually condensed to form the ocean; There is also an opinion that water was originally present in the nebula material that formed the Earth. Another group of scientists believes that silicates and other materials in the original earth's crust were affected by volcanoes and reacted with precipitated water.
There is also an opinion that comets and meteorites, which are attracted to the Earth, are the main source of water on the Earth, and even the water on the Earth is constantly increasing.
Water culture is a kind of water-related culture, which exists in different ethnic groups, countries and regions. It includes people's understanding and feelings about water, the concept of water, the way of water management, social norms and laws, social behavior towards water, the cultural achievements of water treatment and water environment improvement, etc., which are expressed through religion, literature and art, institutions, social behaviors and material construction. It's a culture that shows the harmonious relationship between people and water.
In environmental science research, especially in the field of global climate change, N2O is often referred to as nitrous oxide. >>>More
What is Carbon Monoxide? Parse.
1. See if it can be burned; 2. When combusting, the flame is covered with a dry beaker 1 to prove that it is generated without water. (excluding the interference of other gaseous organic compounds) 3. The gas generated by combustion passes into the clear lime aqueous solution, and white precipitates are generated, then the combustion product is carbon dioxide, and the original gas is carbon monoxide. >>>More
No. Carbon monoxide molecules are small and not easily adsorbed; Carbon monoxide is insoluble in water and is not a salt (does not react with acids or alkalis), making it difficult to absorb.
1.The number of electrons transferred is 2e-, Oxidant: Copper sulfate Oxidation product: Iron sulfate. >>>More