It is required to remember the density of (1) water, that is,1.0×10.3 kg/m 3. Read as per cubic meter 1.0× 10 3 kg.
(2) The physical meaning of density comes from the definition: the mass per unit volume of matter, the density of water is 1.0× 10 3 kg/m 3, the physical meaning is1m 3, and the mass of water is1.0×1.
Therefore, the answer is:1.0×103; Per cubic meter 1.0× 10 3 kg; 1m 3 The mass of water is 1.0× 10.3 kg.
Extended data:
Water (colorless and odorless transparent liquid at normal temperature and pressure) is called the source of human life. Water includes natural water (rivers, lakes, atmospheric water, seawater, groundwater, etc.). ) [containing impurities], distilled water [theoretical pure water], artificial water (water formed by the combination of hydrogen atoms and oxygen atoms through chemical reactions).
Water is one of the most common substances on the earth, an important resource for all life, including inorganic compounds and human beings, and the most important component of organisms. Water plays an important role in the evolution of life. It is a kind of non-renewable resources in a narrow sense and renewable resources in a broad sense.
Pure water can conduct electricity, but it is very weak (conductivity can be ignored in daily life) and belongs to extremely weak electrolyte. Due to the dissolution of other electrolytes, there are more positive and negative ions in water in daily life, and its conductivity is enhanced.