Answer:
percipitate or sedements from chemical reactions
The formula of this is : MV = MV or Molarity × Volume = Molarity × Volume. So you do:
25X = 18×.205=.1476M
It is point source pollution.
When a reaction takes place under ideal conditions all of the reactants are completely converted into products
This is what is normally termed a single replacement reaction, although don't hold me to that. It could have changed to something more modern.