salt is a pure substance or impure substance
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Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate). ... If you add soot to air, it ceases to be a pure substance. Contaminants in water make it impure.
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salt (sodium chloride) and baking soda (sodium bicarbonate).If you add soot to air, it ceases to be a pure substance. Contaminants in water make it impure
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