why water is a compound substance but air is a mixed substance? why carbon is a fundamental element but coal is a compound element?
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Water is a compound because it is composed of water molecules, each one with 2 H atoms & 1 O atom. ... Air is a mixture because it is in fact composed of mostly O-gas molecules (each with 2 O atoms) and N-gas molecules (each composed of 2 N atoms).
Carbon (from Latin: carbo "coal") is a chemical element with the symbol C and atomic number 6. ... Carbon's abundance, its unique diversity of organic compounds, and its unusual ability to form polymers at the temperatures commonly encountered on Earth enables this element to serve as a common element of all known life
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