Water, oxygen, air, carbon dioxide
Among them, those containing oxygen molecules are: oxygen, air
Among them, those containing of oxygen atoms are: water, air, carbon dioxide ---- (There is also carbon dioxide in the air)
Those that contain oxygen elements are : water, oxygen, air, carbon dioxide
Those which are compounds are: water, carbon dioxide
These are elementary substances that is: oxygen
What is a mixture: air
Does water contain carbon dioxide?
Carbon dioxide present in water will affect the pH value of the water. If it contains a large amount of carbon dioxide, it makes the water acidic because carbon dioxide dissolves in water to form carbonic acid.
Carbon dioxide is a greenhouse gas common in the air. It is a gaseous compound. The chemical formula for carbon and oxygen is CO2. A carbon dioxide molecule is made up of two oxygen atoms and one carbon atom. a covalent bond.
Carbon dioxide is a colorless, odorless, incombustible and non-flammable gas at room temperature. It is denser than air, slightly soluble in water, and reacts with water to form carbonic acid. Compressed carbon dioxide is commonly called dry ice. Industrially, it can be prepared by decomposing calcium carbonate under high heat. In the laboratory, it is usually prepared by reacting limestone (or marble) and dilute hydrochloric acid.
Contains
The existence of living things, the non-existence of non-living things, the basic characteristics of living things are reflected in six aspects: growth, development, reproduction , genetic variation and stress, all of which are part of the phenomenon of life that manifests itself on the basis of metabolism, the metabolism is therefore the most fundamental characteristic and the basis of all vital activities of organisms. This is the essential difference between living beings and non-living beings.