Question

whar is substance? ​

Answer 1

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• A substance is a single kind of matter that is pure- it always has a specific composition and a soecific set of properties.
• A properties of matter depend on its makeup.
• Some types of matters are substances and some are not.
• Example is salt- no matter where is comes from- seawater or salt mine - it always has the same composition and properties.

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Answer 2

✒Question :

What is a substance?

✒Answer:

✔A chemical substance is a form of matter having constant chemical composition and characteristic properties.

✔ Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods without breaking chemical bonds.

✔Chemical substances can be simple substances, chemical compounds, or alloys.

✔Chemical substances are often called 'pure' to set them apart from mixtures

A common example of a chemical substance is pure water .

✔ It has the same properties and the same ratio of hydrogen to oxygen whether it is isolated from a river or made in a laboratory.

✔Other chemical substances commonly encountered in pure form are diamond (carbon), gold, table salt (sodium chloride) and refined sugar (sucrose).

✔However, in practice, no substance is entirely pure, and chemical purity is specified according to the intended use of the chemical.

✨HOPE IT HELPS YOU :-)