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A marble is a small spherical often made from glass.
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U–tube filled with a sodium hydroxide is used for a cleaned and dried gas. U–tube filled with a 1 mol dm–3 aqueous potassium nitrate solution is used as a permanent salt bridge. U–tube is a device used for water electrolysis, for laboratory hydrogen and oxygen obtaining.
Bottle Polystop Dropper is used for dispensing small amounts of liquid.
Used for weighing samples of chemical substances
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