Substances can be categorised in two ways: as an element, mixture or compound ora as a solid, liquid or gas. which of these methods Is of most use ti chemist?​

Most substances on earth are compounds and most interesting chemistry is done with compounds. Most interesting chemistry is done with mixtures of compounds although they often start with pure compounds and then do reactions as mixtures. Most chemistry is carried out in liquid solutions made up of compounds that are solids, liquids, or gases in their pure form.

Explanation:

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they are all solids.