Question

which separation procedure is most likely to happen? freezing a compound will break it down into elements. filtering a mixture will separate it into substances. boiling a pure substance will separate it into mixtures. melting an element will break it down into compounds.

Explanation:

1. Freezing a compound is a physical - state change, not a chemical decomposition into elements. Compounds break down into elements through chemical reactions like electrolysis or thermal decomposition under specific conditions, not by freezing.
2. Filtering is a common separation technique for mixtures. It can separate a mixture into its components based on particle size. For example, filtering a mixture of sand and water can separate the sand (solid) from the water (liquid).
3. Boiling a pure substance only changes its physical state (from liquid to gas). A pure substance has a fixed composition and boiling it does not turn it into a mixture.
4. Melting an element is a physical - state change from solid to liquid. Elements are pure substances and melting does not break them down into compounds as compounds are formed by chemical combination of different elements.

Answer:

Filtering a mixture will separate it into substances.