Question

why the stopper of a density bottle has a narrow whole through it?​

Answer 1

Answer:

To ensure that the volume of liquid in the bottle is exactly what is measured, the bottle has a narrow neck through which a ground glass stopper with a fine hole is inserted. This ensures that any excess liquid rises through this hole and out of the bottle when the bottle is filled with liquid.

Explanation:

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Answer 2

Answer:

To ensure that the volume of liquid in the bottle is exactly what is measured, the bottle has a narrow neck through which a ground glass stopper with a fine hole is inserted. This ensures that any excess liquid rises through this hole and out of the bottle when the bottle is filled with liquid.