Determining the amount of liquid water in a pressure vessel

[clurt]

So there is a mass of 100kg and volume of 1m^3. (Distiller water)

That's 0.01 m^3/kg

How do I calculate the percentages?

 

[SteamKing]

So there is a mass of 100kg and volume of 1m^3. (Distiller water)

That's 0.01 m^3/kg

How do I calculate the percentages?

The percentage of what?

 

[russ_watters]

If you know the temperature or pressure you can use a steam table and a short simultaneous equation.