Question

what is the meaning of 'during refers to a substance'?​

Answer 1

Answer:

A substance is a pure single form of matter. It cannot be separated into other kinds of matter by any physical process. The substance must be composed of atoms and molecules. The substance must have a particular amount of weight, mass and volume.

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Answer 2

Answer:

Any material that possesses physical properties is called a substance. The word also refers to the gist or main idea of something. If you remember the main point of a lesson, you've got the substance.

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Explanation: