An aqueous solution is made by dissolving 15.6 grams of nickel acetate in 373 grams of water.
The molality of nickel acetate in the solution is
chemistry - DrBob222, Monday, June 20, 2011 at 5:23pm
I assume that is nickel(II) acetate.
moles Ni(C2H3O2)2 = grams/molar mass.
m = moles/kg soln.