Weegy: Law of conservation of mass states that in a closed system, whatever reaction occurs in that system, the mass will always be constant. [
A closed system is a system in the "state of being isolated from its surrounding environment"
So in ANY REACTION, give that the reaction occurs within a closed system, the mass will always be the same.
But if it's not in a closed system, the mass will differ.
Let's take your example.
2NaCl + 2H2O ... (More)