Question

relate the statement "you can't get something for nothing" to the law of the conservation of mass

Answer 1

Matter can neither be created nor destroyed. Meaning you can't have "no matter and get matter". I hope this helps.

Answer 2

If you do not posses anything which means from the conservation of mass you can not get anything, means we can not create anything.

Step-by-step explanation:

By the law of mass conservation, we can not create matter nor it can be destroyed but it can transfer from one form to another.

If you do not posses anything which means from the conservation of mass you can not get anything, means we can not create anything or we can not create matter because if it is so there will be violation of conservation of mass which is not possible.