Is activated charcoal mixed with toothpaste a physical or chemical change?

Substance x has a fixed volume, and the attraction between its particles is strong .substance y had widely spread out particles and can be compressed what can most likely be concluded about these substances

Brainliesttt me asap! the below reaction can be categorized as more than one type of reaction. which reactions are these, and what are the types of reactions?

An observation that requires measurement is called quantitative observable or qualitative