7th class. Chemistry0+
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The mass fraction of an element in a complex substance.
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Physical and chemical phenomena
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Chemical properties of substances
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Law of conservation of mass
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Chemical equations
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Air.
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Oxygen
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Extraction of oxygen
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Interaction of oxygen with simple substances
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Oxides.
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Combustion of some complex substances
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Oxygen circulation.
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Use of oxygen
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Water in nature.
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Water as a solvent.
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The mass fraction of the dissolved substance
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Preparation of the solution.
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Reactions of water with oxides.
2020Online School, Documentary, Education, Ukraine
Full HD153 minutes
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