Answer:
in 2.5 mole SO42 there are 25 Eq
I really do not want you to get it wrong but i will go with nitride ion, oxide ion, sodium ion, magnesium ion
Mg, In, Pb,Co and Cs are all expected to form positive ions because they are considered types of metals. P, I, Cl, and O are going to form negative ions.
Mass will increase drastically the GPE since mass since mass is a variable in the formula GPE= mgh. 2.