WebFeb 23, 2024 · water, a substance composed of the chemical elements hydrogen and oxygen and existing in gaseous, liquid, and solid states. It is one of the most plentiful and essential of compounds. A tasteless and odourless liquid at room temperature, it has the important ability to dissolve many other substances. Indeed, the versatility of water as a … WebMay 20, 2024 · Solution. Physical: boiling and melting are physical changes. When water boils, no bonds are broken or formed. The change could be written: H 2O(l) → H 2O(g) Chemical: The dark grey nail changes color to form an orange flaky substance (the rust); this must be a chemical change. Color changes indicate chemical change.
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WebThe four elements were even used to described the four temperaments a person could have, and Hippocrates used the four elements to describe the four “humors” found in the body. These theories stated that the … WebAug 18, 2024 · The physical properties of a substance depends upon its physical state. Water vapor, liquid water and ice all have the same chemical properties, but their physical properties are considerably different. In general covalent bonds determine: molecular shape, bond energies, chemical properties, while intermolecular forces (non-covalent bonds) … song son of a bitc
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WebIn short, soil is a mixture of minerals, dead and living organisms (organic materials), air, and water. These four ingredients react with one another in amazing ways, making soil one of our planet’s most dynamic and important natural resources. Soil is used by people in numerous ways. Because of this, it has many definitions. WebNov 22, 2024 · The terms white matter and gray matter refer to different components of nervous tissue found in the brain and spinal cord, which make up the central nervous system (CNS). Neurons, specialized... WebApr 1, 2024 · Matter has mass and takes up space. The four main states of matter are solids, liquids, gases, and plasma. Under exceptional conditions, other states of matter also exist. A solid has a definite shape and … small freezer wattage draw