Answer:
a process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction
Fe^2 O^3 + 6HCl --> 2FeCl^3 + 3H^2 O
Some policies they might do is to put limits on water usage, like making sure that people don't use too much water in baths and when they are tending to their gardens.
Reactants are substances that start a chemical reaction, and products are substances that are produced in the reaction hope this helps