2. The existence of _blank explains why the atomic masses for elements
are not expressed as whole numbers.

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder

What is a metal replacement reaction

Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.