Question

1. A substance is a form of matter that has a
composition​

Answer 1

Answer:

a substance us a form of a matter which has different composition

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Answer 2

Answer:

A pure substance is a form of matter that has a constant composition (meaning it's the same everywhere) and properties that are constant throughout the sample (meaning there is only one set of properties such as melting point, color, boiling point, etc. throughout the matter)

hope this will help you