Iron Block

An iron block of the mass 1 kg is suspended on a spring of the spring constant 130 N/m , and merged into a vessel with 10 liters of water. The mass is displaced by 10 cm from its equilibrium position, and released.

a. What is the mass of water in the container in kg?

I think iron density is 7860... so i solved for volume which is 1/7860=block..then figured out the mass in water by using volume* density of water (1000)= .127. then subtracted that to find the new mass... but it isn't correct, not sure what im doing wrong

 

ummm...i really dont think color matters in this type of problem (if so its not THAT advance...)