How does the amount of matter change when water changes state ?

Explanation:

According to law of conservation of matter, mass or matter can never be created nor it can be destroyed as it can only be transformed from one form to another.

For example, freezing of water changes liquid form of water into solid form.  

Therefore, state of matter can be changed but amount of matter will remain the same.

Thus, we can conclude that the amount of matter stays the same as water changes state.

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.