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- Table salt is a substance - sodium chloride (NaCl); the salt contain two elements chemically bonded.

- Salt water is a mixture of water (H2O), the solvent, with sodium chloride and other salts; also contain insoluble materials.

- Sand is a powdered material; sand has different compositions: calcium carbonate, lava, silicates etc.

Sand may be a substance if it is pure.

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10y ago

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