If you have 100moles of water and all of it becomes ice or steam?

Question

If you have 100moles of water and all of it becomes ice or steam will the mass still be the same?

Answer 1

Assuming none escapes, yes.

Answer 2

Yes, Conservation of Mass.

Only the State (and the Kinetic Energy) of the molecules change.

Answer 3

Yes.. theres a law that states it..

Answer 4

Yes, you have just changed the phase, from liquid to solid or gas...