1. Why was a mole created?

"The mole is important because it allows chemists to work with the subatomic world with macro world units and amounts. Atoms, molecules and formula units are very small and very difficult to work with usually. However, the mole allows a chemist to work with amounts large enough to use."

- Source socratic.org

Hope this helped!

the dependant variable is spilled water

the independent is the heat