(Solved): At this point, you know the mass percent of all the components of your nickel complex except for wat ...

At this point, you know the mass percent of all the components of your nickel complex except for water. Determine the mass percent of water in your complex, using the fact that the percentages of all components in the complex must add up to 100%. calculate the mass% of H2O in the complex: mass% H2O in the copper complex