Calculating mass of a solvent in a mixture, given volume and molality?

[oppyykm]

Say for example you have take a sample of 500ml from a bulk saline solution (NaCl and H20). If you know that for every 100 grams of water there is 10 grams of NaCl, can you calculate the amount of NaCl in 500ml of the final mixture?

 

[Nathanael]

I think you'd need to know the densities since ml is volume and grams is mass