The composition of water chemistry, what water is made of chemistry

Water is made up of the elements hydrogen and oxygen.

Hydrogen is a colorless gas and less dense than air (among all gases, hydrogen has the least density. Under standard conditions, the mass of 1 liter of hydrogen is grams, which is much lighter than air for the same volume). Because hydrogen is poorly soluble in water, it can be collected using the drain gas collection method.

In addition, at a pressure of 101 kPa, hydrogen can be converted into a colorless liquid at temperature; , it becomes a snow-like solid. At room temperature, hydrogen is very stable and does not easily react with other substances. But when the conditions change (e.g., ignition, heating, use of catalysts, etc.), the situation is different.

For example, hydrogen has strong activity after being adsorbed by metals such as palladium or platinum (especially adsorbed by palladium). Palladium metal has the strongest adsorption effect on hydrogen. When the volume fraction in the air is 4%-75%, it can cause ** when it encounters an ignition source.

Water is made up of the elements hydrogen and oxygen, which can also be said to be made up of two hydrogen atoms and one oxygen atom.

Chemical Formula: H2O energized H2+O2

That's a lot. Most of them are water molecules, as well as minerals such as calcium and magnesium. And organic matter.

Water is made up of the elements hydrogen and oxygen. The mass ratio is 8:1

Composition of water in junior chemistry.

Water is made up of two elements, hydrogen and oxygen. The chemical formula of water (H2O).

Water molecules are polar, i.e., the positive and negative charge centers of water molecules do not coincide, which makes water a good solvent. Many common gases can be dissolved in water, such as ammonia, sulfur dioxide, carbon dioxide, nitrogen dioxide, etc., and the solubility of these gases is related to factors such as temperature, pressure, and partial pressure of the gas phase.

Physicochemical properties of water.

Water is a colorless, tasteless, and odorless liquid at room temperature. 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.

At standard atmospheric pressure, pure water has a boiling point of 100 and a freezing point of 0. The specific heat capacity of water is large, c, so it can play a good role in regulating temperature. The standard enthalpy of formation of water is very high, δfhm, so the thermal stability is good.

At a high temperature of 2000K, its dissociation is less than one hundredth.

The water molecule is made up of one oxygen atom and two hydrogen atoms.

Water is an inorganic substance composed of two elements, hydrogen and oxygen, and is non-toxic. It is a colorless and odorless transparent liquid at room temperature and pressure, and is known as the source of human life.

Water, including natural water, distilled water, purified water, and artificially produced water. Water is one of the most common substances on the earth, an important resource for the survival of all life, including inorganic chemistry, and the most important component of living organisms. Water has played an important role in the evolution of life.

It is a narrow sense of non-renewable, broad sense of renewable resources.

Water is one of the most common substances on the earth, an important resource for the survival of all life, including inorganic chemistry, and the most important component of living organisms. Water has played an important role in the evolution of life. It is a narrowly non-renewable, broadly defined renewable resource.

Pure water conducts electricity, but it is very weak and is a very weak electrolyte. Water in daily life has more positive and negative ions due to the dissolution of other electrolytes, and the conductivity is enhanced.

Water is made up of two hydrogen atoms and one oxygen atom.

Chemical formula: H O

Structural formula: h—o—h (angle between two hydroxide-oxygen bonds.

For a long time, it was thought that water was an elemental substance because it was difficult to break it down with ordinary heating methods.

It was not until the end of the 18th century that scientists experimentally proved that water is a chemical compound, and after a large number of experimental measurements and scientific analysis, it was confirmed that one water molecule is composed of two hydrogen atoms and one oxygen atom.

1.Chlorine and hydrogen.

2.Hydrogen and oxygen.

Correct answer: Hydrogen and oxygen.

Water is composed of hydrogen and oxygen, a water molecule is composed of two hydrogen atoms and one oxygen atom, and a water molecule H2O is composed of two hydrogen atoms and one oxygen atom.

1: H2O, hydroxide element.

2: A water molecule is made up of two hydrogen atoms and one oxygen atom.

3: The ratio of hydrogen to oxygen is 2:1

4:h:o=ratio of relative atomic mass to the product of the element=2:16 in a faint question, this is the first question?

Starry Sky answers.

Water is made up of the elements hydrogen and oxygen.

One water molecule is made up of two hydrogen atoms and one oxygen atom.

The ratio of the number of hydrogen and oxygen atoms in water molecules is 2:1

The mass ratio of hydrogen to oxygen in water is 1:8

An H molecule and an oxygen atom make up H2O