calculate the weight of copper in the Cu(NH3)4SO4 H20 you made.

Question

Mass of Cu(NH3)4SO4 H20 = 0.1140g

Answer 1

You have already been given the mass of that compound.

For the mass of copper it contains, multiply by
63.54/[63.54 + (4*17) + 32 +(4*16) +18]
That is the fraction of the mass of each molecule that is copper.