PLEASE HELP a. How does ion exchange work? Why does it remove calcium ions (Caạt) and magnesium
ions (Mg?") from hard water? (4 points)
b. What occurs during the recharge process? Why is recharging with a salt brine solution
that contains sodium chloride (NaCl) necessary? (4 points)

Where is the graph ?

Compound with sulfer  is bright red 

Hello thereone of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description? answer: atomic mass  was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

Answer(true);