The formula for nickel(II) nitrate is Ni(NO3)2. 1. How many GRAMS of Ni2+ are present in 4.29 moles of nickel(II) nitrate? grams. 2. How many MOLES of NO3ion are present in 3.58 grams of nickel(II) nitrate? moles. The formula for copper(I) bromide is CuBr. 1. How many GRAMS of Cu+are present in 2.35 moles of copper(I) bromide? grams. 2. How many MOLES of Brion are present in 3.47 grams of copper(I) bromide? moles. The formula for nickel(II) oxide is NiO. 1. How many GRAMS of Ni2+ are present in 4.21 moles of nickel(II) oxide? grams. 2. How many MOLES of O2 ion are present in 4.65grams of nickel(II) oxide? moles