Question

A substance that can be separated into two or more substances only by a chemical change is a

Answer 1

Answer:

• Compound

Explanation:

Compounds are pure substances formed by two or more different kind of atoms.

For example, H₂O, and CaCO₃ are compounds.

• H₂O can be separated into hydrogen (H₂)  and oxygen (O₂) only by a chemical change.

• CaCO₃ can be separated into CaO and CO₂ only by a chemical change.

Elements can not be separated into other substances by a chemical change. The process to change an element into other substance (different element) is a nuclear reaction (transmutation).

Mixtures are not pure substances and can be separated into other substances by physical changes: for example, a brine can be separated into salt and water by evaporation.