8. When 2.24 g sample of a hydrate of calcium nitrate was heated, 0.54 grams of water was driven off. What is the formula and name of the hydrate of calcium nitrate?

C6irc68rd6rid5rucr5u i6i iyf yif ify iyf ify yfi itf yfi yfi icy yfi yci yci iyc iyf iyf

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na

"electrical energy" transforms to "thermal energy".hope my answer has you : )