Which situation involves a chemical change? a food rotting b paper ripping c water freezing

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

In water, a strong acid will break down into its component parts. a. completely b. partly c. never in water, a weak base will break down into its component parts. a. completely b. partly c. never

Answer explain why it is not possible to deduce a complete order of reactivity.