Alright, so mass is a property of a physical body. During physical changes, such as acceleration, force, etc, the mass stays the same since we are not affecting its physical shape, just where it is physics wise. So yeah mass is conserved during a physical change.
(This is very confusing I'm bad at explaining things sorry)
Answer:
The link doesn't work but it is known that when you add salt to ice, the ice not only melts but will actually get colder.
hope this at least helped you :>
